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158482921 = 125892

158482921 has 3 divisors (see below), whose sum is σ = 158495511. Its totient is φ = 158470332.

The previous prime is 158482913. The next prime is 158482931. The reversal of 158482921 is 129284851.

The square root of 158482921 is 12589.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 129284851 = 454728433.

It can be written as a sum of positive squares in only one way, i.e., 13039321 + 145443600 = 3611^2 + 12060^2 .

It is not a de Polignac number, because 158482921 - 23 = 158482913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158482901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 6295 + ... + 18883.

It is an arithmetic number, because the mean of its divisors is an integer number (52831837).

Almost surely, 2158482921 is an apocalyptic number.

158482921 is the 12589-th square number.

158482921 is the 6295-th centered octagonal number.

It is an amenable number.

158482921 is a deficient number, since it is larger than the sum of its proper divisors (12590).

158482921 is an frugal number, since it uses more digits than its factorization.

158482921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25178 (or 12589 counting only the distinct ones).

The product of its digits is 46080, while the sum is 40.

The cubic root of 158482921 is about 541.1622440738.

It can be divided in two parts, 15848 and 2921, that added together give a square (18769 = 1372).

The spelling of 158482921 in words is "one hundred fifty-eight million, four hundred eighty-two thousand, nine hundred twenty-one".

Divisors: 1 12589 158482921