12815870 has 8 divisors (see below), whose sum is σ = 23068584. Its totient is φ = 5126344.

The previous prime is 12815867. The next prime is 12815923. The reversal of 12815870 is 7851821.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 640784 + ... + 640803.

It is an arithmetic number, because the mean of its divisors is an integer number (2883573).

Almost surely, 2^12815870 is an apocalyptic number.

12815870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12815870 is a deficient number, since it is larger than the sum of its proper divisors (10252714).

12815870 is a wasteful number, since it uses less digits than its factorization.

12815870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281594.

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 12815870 is about 3579.9259768883. The cubic root of 12815870 is about 234.0180544669.

The spelling of 12815870 in words is "twelve million, eight hundred fifteen thousand, eight hundred seventy".