12137505 has 16 divisors (see below), whose sum is σ = 19656000. Its totient is φ = 6394688.

The previous prime is 12137497. The next prime is 12137509. The reversal of 12137505 is 50573121.

It is a cyclic number.

It is not a de Polignac number, because 12137505 - 2³ = 12137497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12137509) 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, 3630 + ... + 6119.

It is an arithmetic number, because the mean of its divisors is an integer number (1228500).

Almost surely, 2^12137505 is an apocalyptic number.

12137505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12137505 is a deficient number, since it is larger than the sum of its proper divisors (7518495).

12137505 is an equidigital number, since it uses as much as digits as its factorization.

12137505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9840.

The product of its (nonzero) digits is 1050, while the sum is 24.

The square root of 12137505 is about 3483.8922199173. The cubic root of 12137505 is about 229.8139958041.

The spelling of 12137505 in words is "twelve million, one hundred thirty-seven thousand, five hundred five".