142587481 has 3 divisors (see below), whose sum is σ = 142599423. Its totient is φ = 142575540.

The previous prime is 142587433. The next prime is 142587491. The reversal of 142587481 is 184785241.

The square root of 142587481 is 11941.

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: 184785241 = 19 ⋅9725539.

It can be written as a sum of positive squares in only one way, i.e., 37319881 + 105267600 = 6109^2 + 10260^2 .

It is not a de Polignac number, because 142587481 - 2¹¹ = 142585433 is a prime.

It is a super-2 number, since 2×142587481² = 40662379475850722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142587491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 5971 + ... + 17911.

It is an arithmetic number, because the mean of its divisors is an integer number (47533141).

Almost surely, 2^142587481 is an apocalyptic number.

142587481 is the 11941-st square number.

142587481 is the 5971-st centered octagonal number.

It is an amenable number.

142587481 is a deficient number, since it is larger than the sum of its proper divisors (11942).

142587481 is an frugal number, since it uses more digits than its factorization.

142587481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23882 (or 11941 counting only the distinct ones).

The product of its digits is 71680, while the sum is 40.

The cubic root of 142587481 is about 522.4288263363.

The spelling of 142587481 in words is "one hundred forty-two million, five hundred eighty-seven thousand, four hundred eighty-one".