11725731 has 12 divisors (see below), whose sum is σ = 17043208. Its totient is φ = 7768224.

The previous prime is 11725729. The next prime is 11725739. The reversal of 11725731 is 13752711.

It is a happy number.

It is not a de Polignac number, because 11725731 - 2¹ = 11725729 is a prime.

It is a super-4 number, since 4×11725731⁴ (a number of 29 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11725695 and 11725704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11725739) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2530 + ... + 5463.

Almost surely, 2^11725731 is an apocalyptic number.

11725731 is a deficient number, since it is larger than the sum of its proper divisors (5317477).

11725731 is a wasteful number, since it uses less digits than its factorization.

11725731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8162 (or 8159 counting only the distinct ones).

The product of its digits is 1470, while the sum is 27.

The square root of 11725731 is about 3424.2854729126. The cubic root of 11725731 is about 227.1851685067.

It can be divided in two parts, 1172 and 5731, that added together give a triangular number (6903 = T₁₁₇).

The spelling of 11725731 in words is "eleven million, seven hundred twenty-five thousand, seven hundred thirty-one".