12738985 has 32 divisors (see below), whose sum is σ = 18432000. Its totient is φ = 8268480.

The previous prime is 12738983. The next prime is 12738991. The reversal of 12738985 is 58983721.

12738985 = T₂₃₈ + T₂₃₉ + ... + T₄₄₇.

It is not a de Polignac number, because 12738985 - 2¹ = 12738983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12738983) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63916 + ... + 64114.

It is an arithmetic number, because the mean of its divisors is an integer number (576000).

Almost surely, 2^12738985 is an apocalyptic number.

It is an amenable number.

12738985 is a deficient number, since it is larger than the sum of its proper divisors (5693015).

12738985 is a wasteful number, since it uses less digits than its factorization.

12738985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301.

The product of its digits is 120960, while the sum is 43.

The square root of 12738985 is about 3569.1714724849. The cubic root of 12738985 is about 233.5491416088.

The spelling of 12738985 in words is "twelve million, seven hundred thirty-eight thousand, nine hundred eighty-five".