131232725 has 36 divisors (see below), whose sum is σ = 178699500. Its totient is φ = 95546880.

The previous prime is 131232721. The next prime is 131232737. The reversal of 131232725 is 527232131.

It can be written as a sum of positive squares in 18 ways, for example, as 125596849 + 5635876 = 11207^2 + 2374^2 .

It is not a de Polignac number, because 131232725 - 2² = 131232721 is a prime.

It is a super-2 number, since 2×131232725² = 34444056221851250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131232694 and 131232703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131232721) 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 35 ways as a sum of consecutive naturals, for example, 375851 + ... + 376199.

It is an arithmetic number, because the mean of its divisors is an integer number (4963875).

Almost surely, 2^131232725 is an apocalyptic number.

It is an amenable number.

131232725 is a deficient number, since it is larger than the sum of its proper divisors (47466775).

131232725 is a wasteful number, since it uses less digits than its factorization.

131232725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474 (or 456 counting only the distinct ones).

The product of its digits is 2520, while the sum is 26.

The square root of 131232725 is about 11455.6852697689. The cubic root of 131232725 is about 508.1758812424.

Adding to 131232725 its reverse (527232131), we get a palindrome (658464856).

The spelling of 131232725 in words is "one hundred thirty-one million, two hundred thirty-two thousand, seven hundred twenty-five".