11091457 has 4 divisors (see below), whose sum is σ = 11944660. Its totient is φ = 10238256.

The previous prime is 11091449. The next prime is 11091461. The reversal of 11091457 is 75419011.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1874161 + 9217296 = 1369^2 + 3036^2 .

It is a cyclic number.

It is not a de Polignac number, because 11091457 - 2³ = 11091449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11091467) 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, 426582 + ... + 426607.

It is an arithmetic number, because the mean of its divisors is an integer number (2986165).

Almost surely, 2^11091457 is an apocalyptic number.

It is an amenable number.

11091457 is a deficient number, since it is larger than the sum of its proper divisors (853203).

11091457 is an equidigital number, since it uses as much as digits as its factorization.

11091457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 853202.

The product of its (nonzero) digits is 1260, while the sum is 28.

The square root of 11091457 is about 3330.3839118036. The cubic root of 11091457 is about 223.0126679445.

The spelling of 11091457 in words is "eleven million, ninety-one thousand, four hundred fifty-seven".