157621025 has 12 divisors (see below), whose sum is σ = 206947692. Its totient is φ = 118679040.

The previous prime is 157621007. The next prime is 157621039. The reversal of 157621025 is 520126751.

It can be written as a sum of positive squares in 6 ways, for example, as 3041536 + 154579489 = 1744^2 + 12433^2 .

It is not a de Polignac number, because 157621025 - 2⁶ = 157620961 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 185012 + ... + 185861.

It is an arithmetic number, because the mean of its divisors is an integer number (17245641).

Almost surely, 2^157621025 is an apocalyptic number.

It is an amenable number.

157621025 is a deficient number, since it is larger than the sum of its proper divisors (49326667).

157621025 is a wasteful number, since it uses less digits than its factorization.

157621025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370900 (or 370895 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 157621025 is about 12554.7212235079. The cubic root of 157621025 is about 540.1794385381.

Adding to 157621025 its reverse (520126751), we get a palindrome (677747776).

The spelling of 157621025 in words is "one hundred fifty-seven million, six hundred twenty-one thousand, twenty-five".