11257138 has 4 divisors (see below), whose sum is σ = 16885710. Its totient is φ = 5628568.

The previous prime is 11257109. The next prime is 11257151. The reversal of 11257138 is 83175211.

11257138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6517809 + 4739329 = 2553^2 + 2177^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2814283 + ... + 2814286.

Almost surely, 2^11257138 is an apocalyptic number.

11257138 is a deficient number, since it is larger than the sum of its proper divisors (5628572).

11257138 is an equidigital number, since it uses as much as digits as its factorization.

11257138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5628571.

The product of its digits is 1680, while the sum is 28.

The square root of 11257138 is about 3355.1658677329. The cubic root of 11257138 is about 224.1176173339.

It can be divided in two parts, 1125713 and 8, that added together give a square (1125721 = 1061²).

The spelling of 11257138 in words is "eleven million, two hundred fifty-seven thousand, one hundred thirty-eight".