1299051972 has 96 divisors (see below), whose sum is σ = 3424713600. Its totient is φ = 425782656.

The previous prime is 1299051961. The next prime is 1299052003. The reversal of 1299051972 is 2791509921.

1299051972 is a `hidden beast` number, since 129 + 9 + 0 + 519 + 7 + 2 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1918498 + ... + 1919174.

It is an arithmetic number, because the mean of its divisors is an integer number (35674100).

Almost surely, 2^1299051972 is an apocalyptic number.

1299051972 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 1299051972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1712356800).

1299051972 is an abundant number, since it is smaller than the sum of its proper divisors (2125661628).

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

1299051972 is a wasteful number, since it uses less digits than its factorization.

1299051972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962 (or 954 counting only the distinct ones).

The product of its (nonzero) digits is 102060, while the sum is 45.

The square root of 1299051972 is about 36042.3635739944. The cubic root of 1299051972 is about 1091.1275182852.

The spelling of 1299051972 in words is "one billion, two hundred ninety-nine million, fifty-one thousand, nine hundred seventy-two".