11620557 has 16 divisors (see below), whose sum is σ = 18540480. Its totient is φ = 7150896.

The previous prime is 11620549. The next prime is 11620559. The reversal of 11620557 is 75502611.

It is not a de Polignac number, because 11620557 - 2³ = 11620549 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 11620557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11620559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16203 + ... + 16904.

It is an arithmetic number, because the mean of its divisors is an integer number (1158780).

Almost surely, 2^11620557 is an apocalyptic number.

It is an amenable number.

11620557 is a deficient number, since it is larger than the sum of its proper divisors (6919923).

11620557 is a wasteful number, since it uses less digits than its factorization.

11620557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33129 (or 33123 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 11620557 is about 3408.8938088477. The cubic root of 11620557 is about 226.5038813422.

The spelling of 11620557 in words is "eleven million, six hundred twenty thousand, five hundred fifty-seven".