13457665 has 8 divisors (see below), whose sum is σ = 17391528. Its totient is φ = 9937920.

The previous prime is 13457629. The next prime is 13457713. The reversal of 13457665 is 56675431.

13457665 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3211264 + 10246401 = 1792^2 + 3201^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13457665 - 2²¹ = 11360513 is a prime.

It is a super-2 number, since 2×13457665² = 362217494504450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103456 + ... + 103585.

It is an arithmetic number, because the mean of its divisors is an integer number (2173941).

Almost surely, 2^13457665 is an apocalyptic number.

It is an amenable number.

13457665 is a deficient number, since it is larger than the sum of its proper divisors (3933863).

13457665 is a wasteful number, since it uses less digits than its factorization.

13457665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207059.

The product of its digits is 75600, while the sum is 37.

The square root of 13457665 is about 3668.4690267195. The cubic root of 13457665 is about 237.8609985595.

The spelling of 13457665 in words is "thirteen million, four hundred fifty-seven thousand, six hundred sixty-five".