12447972 has 24 divisors (see below), whose sum is σ = 32272800. Its totient is φ = 4149288.

The previous prime is 12447971. The next prime is 12447973. The reversal of 12447972 is 27974421.

It is an interprime number because it is at equal distance from previous prime (12447971) and next prime (12447973).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (12447971) 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, 57522 + ... + 57737.

It is an arithmetic number, because the mean of its divisors is an integer number (1344700).

Almost surely, 2^12447972 is an apocalyptic number.

12447972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12447972 is an abundant number, since it is smaller than the sum of its proper divisors (19824828).

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

12447972 is a wasteful number, since it uses less digits than its factorization.

12447972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115272 (or 115264 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 12447972 is about 3528.1683633296. The cubic root of 12447972 is about 231.7570037996.

It can be divided in two parts, 1244 and 7972, that added together give a square (9216 = 96²).

The spelling of 12447972 in words is "twelve million, four hundred forty-seven thousand, nine hundred seventy-two".