13540724 has 6 divisors (see below), whose sum is σ = 23696274. Its totient is φ = 6770360.

The previous prime is 13540717. The next prime is 13540729. The reversal of 13540724 is 42704531.

It can be written as a sum of positive squares in only one way, i.e., 13468900 + 71824 = 3670^2 + 268^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13540693 and 13540702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13540729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1692587 + ... + 1692594.

It is an arithmetic number, because the mean of its divisors is an integer number (3949379).

Almost surely, 2^13540724 is an apocalyptic number.

It is an amenable number.

13540724 is a deficient number, since it is larger than the sum of its proper divisors (10155550).

13540724 is a wasteful number, since it uses less digits than its factorization.

13540724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3385185 (or 3385183 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 13540724 is about 3679.7722755627. The cubic root of 13540724 is about 238.3493445593.

The spelling of 13540724 in words is "thirteen million, five hundred forty thousand, seven hundred twenty-four".