12720970 has 16 divisors (see below), whose sum is σ = 23517288. Its totient is φ = 4950720.

The previous prime is 12720949. The next prime is 12720971. The reversal of 12720970 is 7902721.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10093329 + 2627641 = 3177^2 + 1621^2 .

It is not an unprimeable number, because it can be changed into a prime (12720971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16821 + ... + 17560.

Almost surely, 2^12720970 is an apocalyptic number.

12720970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12720970 is a deficient number, since it is larger than the sum of its proper divisors (10796318).

12720970 is a wasteful number, since it uses less digits than its factorization.

12720970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34425.

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 12720970 is about 3566.6468846803. The cubic root of 12720970 is about 233.4389974946.

The spelling of 12720970 in words is "twelve million, seven hundred twenty thousand, nine hundred seventy".