156225001 has 9 divisors (see below), whose sum is σ = 162174103. Its totient is φ = 150487960.

The previous prime is 156224987. The next prime is 156225031. The reversal of 156225001 is 100522651.

The square root of 156225001 is 12499.

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

It can be written as a sum of positive squares in only one way, i.e., 81920601 + 74304400 = 9051^2 + 8620^2 .

It is not a de Polignac number, because 156225001 - 2¹¹ = 156222953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (156225031) 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 8 ways as a sum of consecutive naturals, for example, 362256 + ... + 362686.

Almost surely, 2^156225001 is an apocalyptic number.

156225001 is the 12499-th square number.

156225001 is the 6250-th centered octagonal number.

It is an amenable number.

156225001 is a deficient number, since it is larger than the sum of its proper divisors (5949102).

156225001 is an frugal number, since it uses more digits than its factorization.

156225001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920 (or 460 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The cubic root of 156225001 is about 538.5799463291.

Adding to 156225001 its reverse (100522651), we get a palindrome (256747652).

The spelling of 156225001 in words is "one hundred fifty-six million, two hundred twenty-five thousand, one".