12137021 has 8 divisors (see below), whose sum is σ = 13120800. Its totient is φ = 11160432.

The previous prime is 12137017. The next prime is 12137023. The reversal of 12137021 is 12073121.

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 12137021 - 2² = 12137017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12137023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2030 + ... + 5328.

It is an arithmetic number, because the mean of its divisors is an integer number (1640100).

Almost surely, 2^12137021 is an apocalyptic number.

It is an amenable number.

12137021 is a deficient number, since it is larger than the sum of its proper divisors (983779).

12137021 is a wasteful number, since it uses less digits than its factorization.

12137021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3595.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 12137021 is about 3483.8227566855. The cubic root of 12137021 is about 229.8109410453.

The spelling of 12137021 in words is "twelve million, one hundred thirty-seven thousand, twenty-one".