11725641 has 30 divisors (see below), whose sum is σ = 18532602. Its totient is φ = 7387200.

The previous prime is 11725639. The next prime is 11725663. The reversal of 11725641 is 14652711.

It is a happy number.

11725641 is a `hidden beast` number, since 1 + 17 + 2 + 5 + 641 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11696400 + 29241 = 3420^2 + 171^2 .

It is not a de Polignac number, because 11725641 - 2¹ = 11725639 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (11725691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 29041 + ... + 29441.

Almost surely, 2^11725641 is an apocalyptic number.

11725641 is the 2166-th heptagonal number.

It is an amenable number.

11725641 is a deficient number, since it is larger than the sum of its proper divisors (6806961).

11725641 is an equidigital number, since it uses as much as digits as its factorization.

11725641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451 (or 423 counting only the distinct ones).

The product of its digits is 1680, while the sum is 27.

The square root of 11725641 is about 3424.2723314596. The cubic root of 11725641 is about 227.1845872575.

The spelling of 11725641 in words is "eleven million, seven hundred twenty-five thousand, six hundred forty-one".