13253657 has 8 divisors (see below), whose sum is σ = 13629384. Its totient is φ = 12882688.

The previous prime is 13253633. The next prime is 13253677. The reversal of 13253657 is 75635231.

It can be written as a sum of positive squares in 4 ways, for example, as 3400336 + 9853321 = 1844^2 + 3139^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 13253657 - 2¹⁶ = 13188121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13253627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4883 + ... + 7095.

It is an arithmetic number, because the mean of its divisors is an integer number (1703673).

Almost surely, 2^13253657 is an apocalyptic number.

It is an amenable number.

13253657 is a deficient number, since it is larger than the sum of its proper divisors (375727).

13253657 is a wasteful number, since it uses less digits than its factorization.

13253657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2379.

The product of its digits is 18900, while the sum is 32.

The square root of 13253657 is about 3640.5572375668. The cubic root of 13253657 is about 236.6529426237.

Adding to 13253657 its reverse (75635231), we get a palindrome (88888888).

The spelling of 13253657 in words is "thirteen million, two hundred fifty-three thousand, six hundred fifty-seven".