11571925 has 12 divisors (see below), whose sum is σ = 14395780. Its totient is φ = 9227520.

The previous prime is 11571913. The next prime is 11571929. The reversal of 11571925 is 52917511.

It can be written as a sum of positive squares in 6 ways, for example, as 1592644 + 9979281 = 1262^2 + 3159^2 .

It is a de Polignac number, because none of the positive numbers 2^k-11571925 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11571929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10291 + ... + 11359.

Almost surely, 2^11571925 is an apocalyptic number.

It is an amenable number.

11571925 is a deficient number, since it is larger than the sum of its proper divisors (2823855).

11571925 is a wasteful number, since it uses less digits than its factorization.

11571925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1512 (or 1507 counting only the distinct ones).

The product of its digits is 3150, while the sum is 31.

The square root of 11571925 is about 3401.7532244418. The cubic root of 11571925 is about 226.1874668201.

The spelling of 11571925 in words is "eleven million, five hundred seventy-one thousand, nine hundred twenty-five".