12051591 has 8 divisors (see below), whose sum is σ = 16587264. Its totient is φ = 7775160.

The previous prime is 12051577. The next prime is 12051629. The reversal of 12051591 is 19515021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12051591 - 2⁷ = 12051463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12051541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64701 + ... + 64886.

It is an arithmetic number, because the mean of its divisors is an integer number (2073408).

Almost surely, 2^12051591 is an apocalyptic number.

12051591 is a deficient number, since it is larger than the sum of its proper divisors (4535673).

12051591 is a wasteful number, since it uses less digits than its factorization.

12051591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129621.

The product of its (nonzero) digits is 450, while the sum is 24.

The square root of 12051591 is about 3471.5401481187. The cubic root of 12051591 is about 229.2704736247.

The spelling of 12051591 in words is "twelve million, fifty-one thousand, five hundred ninety-one".