11457891 has 6 divisors (see below), whose sum is σ = 16550300. Its totient is φ = 7638588.

The previous prime is 11457889. The next prime is 11457937. The reversal of 11457891 is 19875411.

It is not a de Polignac number, because 11457891 - 2¹ = 11457889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11457811) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 636541 + ... + 636558.

Almost surely, 2^11457891 is an apocalyptic number.

11457891 is a deficient number, since it is larger than the sum of its proper divisors (5092409).

11457891 is a wasteful number, since it uses less digits than its factorization.

11457891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1273105 (or 1273102 counting only the distinct ones).

The product of its digits is 10080, while the sum is 36.

The square root of 11457891 is about 3384.9506643377. The cubic root of 11457891 is about 225.4420347142.

The spelling of 11457891 in words is "eleven million, four hundred fifty-seven thousand, eight hundred ninety-one".