156525121 has 3 divisors (see below), whose sum is σ = 156537633. Its totient is φ = 156512610.

The previous prime is 156525119. The next prime is 156525139. The reversal of 156525121 is 121525651.

The square root of 156525121 is 12511.

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: 121525651 = 13 ⋅9348127.

It is not a de Polignac number, because 156525121 - 2¹ = 156525119 is a prime.

It is a super-2 number, since 2×156525121² = 49000227008129282, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 156525121.

It is not an unprimeable number, because it can be changed into a prime (156525521) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 6256 + ... + 18766.

It is an arithmetic number, because the mean of its divisors is an integer number (52179211).

Almost surely, 2^156525121 is an apocalyptic number.

156525121 is the 12511-st square number.

156525121 is the 6256-th centered octagonal number.

It is an amenable number.

156525121 is a deficient number, since it is larger than the sum of its proper divisors (12512).

156525121 is an frugal number, since it uses more digits than its factorization.

156525121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25022 (or 12511 counting only the distinct ones).

The product of its digits is 3000, while the sum is 28.

The cubic root of 156525121 is about 538.9246099363.

The spelling of 156525121 in words is "one hundred fifty-six million, five hundred twenty-five thousand, one hundred twenty-one".