12137491 has 8 divisors (see below), whose sum is σ = 12840480. Its totient is φ = 11449152.

The previous prime is 12137479. The next prime is 12137497. The reversal of 12137491 is 19473121.

12137491 = 491² + 492² + ... + 536².

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

It is a cyclic number.

It is not a de Polignac number, because 12137491 - 2⁵ = 12137459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12137497) 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 7 ways as a sum of consecutive naturals, for example, 1936 + ... + 5293.

It is an arithmetic number, because the mean of its divisors is an integer number (1605060).

Almost surely, 2^12137491 is an apocalyptic number.

12137491 is a deficient number, since it is larger than the sum of its proper divisors (702989).

12137491 is an equidigital number, since it uses as much as digits as its factorization.

12137491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7325.

The product of its digits is 1512, while the sum is 28.

The square root of 12137491 is about 3483.8902106697. The cubic root of 12137491 is about 229.8139074445.

The spelling of 12137491 in words is "twelve million, one hundred thirty-seven thousand, four hundred ninety-one".