11994557 has 4 divisors (see below), whose sum is σ = 12158940. Its totient is φ = 11830176.

The previous prime is 11994547. The next prime is 11994559. The reversal of 11994557 is 75549911.

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 2328676 + 9665881 = 1526^2 + 3109^2 .

It is a cyclic number.

It is not a de Polignac number, because 11994557 - 2¹⁴ = 11978173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11994559) 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, 82082 + ... + 82227.

It is an arithmetic number, because the mean of its divisors is an integer number (3039735).

Almost surely, 2^11994557 is an apocalyptic number.

It is an amenable number.

11994557 is a deficient number, since it is larger than the sum of its proper divisors (164383).

11994557 is an equidigital number, since it uses as much as digits as its factorization.

11994557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164382.

The product of its digits is 56700, while the sum is 41.

The square root of 11994557 is about 3463.3158966516. The cubic root of 11994557 is about 228.9082283890.

The spelling of 11994557 in words is "eleven million, nine hundred ninety-four thousand, five hundred fifty-seven".