11958591 has 16 divisors (see below), whose sum is σ = 16588800. Its totient is φ = 7654560.

The previous prime is 11958589. The next prime is 11958607. The reversal of 11958591 is 19585911.

It is not a de Polignac number, because 11958591 - 2¹ = 11958589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11958521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13426 + ... + 14288.

It is an arithmetic number, because the mean of its divisors is an integer number (1036800).

Almost surely, 2^11958591 is an apocalyptic number.

11958591 is a deficient number, since it is larger than the sum of its proper divisors (4630209).

11958591 is a wasteful number, since it uses less digits than its factorization.

11958591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1046.

The product of its digits is 16200, while the sum is 39.

The square root of 11958591 is about 3458.1195757232. The cubic root of 11958591 is about 228.6792035086.

It can be divided in two parts, 11 and 958591, that multiplied together give a palindrome (10544501).

The spelling of 11958591 in words is "eleven million, nine hundred fifty-eight thousand, five hundred ninety-one".