11721458 has 16 divisors (see below), whose sum is σ = 20145024. Its totient is φ = 5010720.

The previous prime is 11721443. The next prime is 11721473. The reversal of 11721458 is 85412711.

It is an interprime number because it is at equal distance from previous prime (11721443) and next prime (11721473).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11721458.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6491 + ... + 8097.

It is an arithmetic number, because the mean of its divisors is an integer number (1259064).

Almost surely, 2^11721458 is an apocalyptic number.

11721458 is a deficient number, since it is larger than the sum of its proper divisors (8423566).

11721458 is a wasteful number, since it uses less digits than its factorization.

11721458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2137.

The product of its digits is 2240, while the sum is 29.

The square root of 11721458 is about 3423.6614902762. The cubic root of 11721458 is about 227.1575688012.

The spelling of 11721458 in words is "eleven million, seven hundred twenty-one thousand, four hundred fifty-eight".