12720951 has 6 divisors (see below), whose sum is σ = 18374720. Its totient is φ = 8480628.

The previous prime is 12720949. The next prime is 12720971. The reversal of 12720951 is 15902721.

12720951 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12720951 - 2¹ = 12720949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12720941) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 706711 + ... + 706728.

Almost surely, 2^12720951 is an apocalyptic number.

12720951 is a deficient number, since it is larger than the sum of its proper divisors (5653769).

12720951 is a wasteful number, since it uses less digits than its factorization.

12720951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1413445 (or 1413442 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 12720951 is about 3566.6442211132. The cubic root of 12720951 is about 233.4388812733.

It can be divided in two parts, 127209 and 51, that added together give a triangular number (127260 = T₅₀₄).

The spelling of 12720951 in words is "twelve million, seven hundred twenty thousand, nine hundred fifty-one".