12971650 has 24 divisors (see below), whose sum is σ = 24528564. Its totient is φ = 5102400.

The previous prime is 12971641. The next prime is 12971657. The reversal of 12971650 is 5617921.

12971650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 162409 + 12809241 = 403^2 + 3579^2 .

It is not an unprimeable number, because it can be changed into a prime (12971657) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 924 + ... + 5176.

Almost surely, 2^12971650 is an apocalyptic number.

12971650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12971650 is a deficient number, since it is larger than the sum of its proper divisors (11556914).

12971650 is a wasteful number, since it uses less digits than its factorization.

12971650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4326 (or 4321 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 12971650 is about 3601.6176920934. The cubic root of 12971650 is about 234.9624204282.

It can be divided in two parts, 129 and 71650, that multiplied together give a triangular number (9242850 = T₄₂₉₉).

The spelling of 12971650 in words is "twelve million, nine hundred seventy-one thousand, six hundred fifty".