1247031604 has 48 divisors (see below), whose sum is σ = 2726055808. Its totient is φ = 485958528.

The previous prime is 1247031587. The next prime is 1247031623. The reversal of 1247031604 is 4061307421.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

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, 1179 + ... + 49954.

Almost surely, 2^1247031604 is an apocalyptic number.

1247031604 is a gapful number since it is divisible by the number (14) 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 1247031604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1363027904).

1247031604 is an abundant number, since it is smaller than the sum of its proper divisors (1479024204).

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

1247031604 is a wasteful number, since it uses less digits than its factorization.

1247031604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51224 (or 51222 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 1247031604 is about 35313.3346485432. The cubic root of 1247031604 is about 1076.3639737786.

The spelling of 1247031604 in words is "one billion, two hundred forty-seven million, thirty-one thousand, six hundred four".