1247167572 has 48 divisors (see below), whose sum is σ = 3433070592. Its totient is φ = 344838240.

The previous prime is 1247167531. The next prime is 1247167573. The reversal of 1247167572 is 2757617421.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1247167573) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 236868 + ... + 242075.

It is an arithmetic number, because the mean of its divisors is an integer number (71522304).

Almost surely, 2^1247167572 is an apocalyptic number.

1247167572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1247167572 is an abundant number, since it is smaller than the sum of its proper divisors (2185903020).

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

1247167572 is a wasteful number, since it uses less digits than its factorization.

1247167572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478988 (or 478986 counting only the distinct ones).

The product of its digits is 164640, while the sum is 42.

The square root of 1247167572 is about 35315.2597611854. The cubic root of 1247167572 is about 1076.4030922039.

The spelling of 1247167572 in words is "one billion, two hundred forty-seven million, one hundred sixty-seven thousand, five hundred seventy-two".