11491257 has 12 divisors (see below), whose sum is σ = 16164080. Its totient is φ = 7241472.

The previous prime is 11491243. The next prime is 11491307. The reversal of 11491257 is 75219411.

It is not a de Polignac number, because 11491257 - 2⁸ = 11491001 is a prime.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11491217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25369 + ... + 25817.

Almost surely, 2^11491257 is an apocalyptic number.

It is an amenable number.

11491257 is a deficient number, since it is larger than the sum of its proper divisors (4672823).

11491257 is an frugal number, since it uses more digits than its factorization.

11491257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920 (or 471 counting only the distinct ones).

The product of its digits is 2520, while the sum is 30.

The square root of 11491257 is about 3389.8756614366. The cubic root of 11491257 is about 225.6606557831.

The spelling of 11491257 in words is "eleven million, four hundred ninety-one thousand, two hundred fifty-seven".