11492721 has 6 divisors (see below), whose sum is σ = 16600610. Its totient is φ = 7661808.

The previous prime is 11492693. The next prime is 11492737. The reversal of 11492721 is 12729411.

It can be written as a sum of positive squares in only one way, i.e., 8381025 + 3111696 = 2895^2 + 1764^2 .

It is not a de Polignac number, because 11492721 - 2¹⁵ = 11459953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11492771) 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, 638476 + ... + 638493.

Almost surely, 2^11492721 is an apocalyptic number.

It is an amenable number.

11492721 is a deficient number, since it is larger than the sum of its proper divisors (5107889).

11492721 is a wasteful number, since it uses less digits than its factorization.

11492721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1276975 (or 1276972 counting only the distinct ones).

The product of its digits is 1008, while the sum is 27.

The square root of 11492721 is about 3390.0915916830. The cubic root of 11492721 is about 225.6702385227.

The spelling of 11492721 in words is "eleven million, four hundred ninety-two thousand, seven hundred twenty-one".