12042591 has 16 divisors (see below), whose sum is σ = 17760000. Its totient is φ = 7197120.

The previous prime is 12042587. The next prime is 12042619. The reversal of 12042591 is 19524021.

It is not a de Polignac number, because 12042591 - 2² = 12042587 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12042551) 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, 91 + ... + 4908.

It is an arithmetic number, because the mean of its divisors is an integer number (1110000).

Almost surely, 2^12042591 is an apocalyptic number.

12042591 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12042591 is a deficient number, since it is larger than the sum of its proper divisors (5717409).

12042591 is a wasteful number, since it uses less digits than its factorization.

12042591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5086.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 12042591 is about 3470.2436513882. The cubic root of 12042591 is about 229.2133871613.

The spelling of 12042591 in words is "twelve million, forty-two thousand, five hundred ninety-one".