12921070 has 32 divisors (see below), whose sum is σ = 24076800. Its totient is φ = 4989600.

The previous prime is 12921061. The next prime is 12921089. The reversal of 12921070 is 7012921.

12921070 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64831 + ... + 65029.

It is an arithmetic number, because the mean of its divisors is an integer number (752400).

Almost surely, 2^12921070 is an apocalyptic number.

12921070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12921070 is a deficient number, since it is larger than the sum of its proper divisors (11155730).

12921070 is a wasteful number, since it uses less digits than its factorization.

12921070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 12921070 is about 3594.5889890222. The cubic root of 12921070 is about 234.6566284482.

Adding to 12921070 its reverse (7012921), we get a palindrome (19933991).

The spelling of 12921070 in words is "twelve million, nine hundred twenty-one thousand, seventy".