1272023472 has 80 divisors (see below), whose sum is σ = 3351035520. Its totient is φ = 415704576.

The previous prime is 1272023437. The next prime is 1272023509. The reversal of 1272023472 is 2743202721.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 552628 + ... + 554924.

It is an arithmetic number, because the mean of its divisors is an integer number (41887944).

Almost surely, 2^1272023472 is an apocalyptic number.

1272023472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1272023472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1675517760).

1272023472 is an abundant number, since it is smaller than the sum of its proper divisors (2079012048).

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

1272023472 is a wasteful number, since it uses less digits than its factorization.

1272023472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2530 (or 2524 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 30.

The square root of 1272023472 is about 35665.4380598360. The cubic root of 1272023472 is about 1083.5069675035.

The spelling of 1272023472 in words is "one billion, two hundred seventy-two million, twenty-three thousand, four hundred seventy-two".