12432720 has 40 divisors (see below), whose sum is σ = 38542176. Its totient is φ = 3315328.

The previous prime is 12432713. The next prime is 12432731. The reversal of 12432720 is 2723421.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25662 + ... + 26141.

Almost surely, 2^12432720 is an apocalyptic number.

12432720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12432720 is an abundant number, since it is smaller than the sum of its proper divisors (26109456).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12432720 is a wasteful number, since it uses less digits than its factorization.

12432720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51819 (or 51813 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 12432720 is about 3526.0062393592. The cubic root of 12432720 is about 231.6623109326.

The spelling of 12432720 in words is "twelve million, four hundred thirty-two thousand, seven hundred twenty".