13520857 has 8 divisors (see below), whose sum is σ = 15829632. Its totient is φ = 11306400.

The previous prime is 13520851. The next prime is 13520863. The reversal of 13520857 is 75802531.

It is an interprime number because it is at equal distance from previous prime (13520851) and next prime (13520863).

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

It is not a de Polignac number, because 13520857 - 2¹¹ = 13518809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13520851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23269 + ... + 23842.

It is an arithmetic number, because the mean of its divisors is an integer number (1978704).

Almost surely, 2^13520857 is an apocalyptic number.

It is an amenable number.

13520857 is a deficient number, since it is larger than the sum of its proper divisors (2308775).

13520857 is an equidigital number, since it uses as much as digits as its factorization.

13520857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47159.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 13520857 is about 3677.0717969602. The cubic root of 13520857 is about 238.2327184913.

The spelling of 13520857 in words is "thirteen million, five hundred twenty thousand, eight hundred fifty-seven".