13761257 has 4 divisors (see below), whose sum is σ = 13789776. Its totient is φ = 13732740.

The previous prime is 13761229. The next prime is 13761289. The reversal of 13761257 is 75216731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75216731 = 677 ⋅111103.

It is a cyclic number.

It is not a de Polignac number, because 13761257 - 2⁸ = 13761001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13761557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13523 + ... + 14504.

It is an arithmetic number, because the mean of its divisors is an integer number (3447444).

Almost surely, 2^13761257 is an apocalyptic number.

It is an amenable number.

13761257 is a deficient number, since it is larger than the sum of its proper divisors (28519).

13761257 is an equidigital number, since it uses as much as digits as its factorization.

13761257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28518.

The product of its digits is 8820, while the sum is 32.

The square root of 13761257 is about 3709.6168265739. The cubic root of 13761257 is about 239.6363532177.

Adding to 13761257 its reverse (75216731), we get a palindrome (88977988).

The spelling of 13761257 in words is "thirteen million, seven hundred sixty-one thousand, two hundred fifty-seven".