12649970 has 8 divisors (see below), whose sum is σ = 22769964. Its totient is φ = 5059984.

The previous prime is 12649963. The next prime is 12649979. The reversal of 12649970 is 7994621.

It can be written as a sum of positive squares in 2 ways, for example, as 11703241 + 946729 = 3421^2 + 973^2 .

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

It is not an unprimeable number, because it can be changed into a prime (12649979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 632489 + ... + 632508.

Almost surely, 2^12649970 is an apocalyptic number.

12649970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12649970 is a deficient number, since it is larger than the sum of its proper divisors (10119994).

12649970 is a wasteful number, since it uses less digits than its factorization.

12649970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1265004.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 12649970 is about 3556.6796313416. The cubic root of 12649970 is about 233.0038865420.

The spelling of 12649970 in words is "twelve million, six hundred forty-nine thousand, nine hundred seventy".