146731481 has 8 divisors (see below), whose sum is σ = 158190984. Its totient is φ = 135296640.

The previous prime is 146731477. The next prime is 146731483. The reversal of 146731481 is 184137641.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3115225 + 143616256 = 1765^2 + 11984^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 146731481 - 2² = 146731477 is a prime.

It is a super-2 number, since 2×146731481² = 43060255032906722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (146731483) 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 7 ways as a sum of consecutive naturals, for example, 7301 + ... + 18621.

It is an arithmetic number, because the mean of its divisors is an integer number (19773873).

Almost surely, 2^146731481 is an apocalyptic number.

It is an amenable number.

146731481 is a deficient number, since it is larger than the sum of its proper divisors (11459503).

146731481 is a wasteful number, since it uses less digits than its factorization.

146731481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12331.

The product of its digits is 16128, while the sum is 35.

The square root of 146731481 is about 12113.2770545381. The cubic root of 146731481 is about 527.4416649701.

The spelling of 146731481 in words is "one hundred forty-six million, seven hundred thirty-one thousand, four hundred eighty-one".