1292994351972 has 72 divisors (see below), whose sum is σ = 3324806328480. Its totient is φ = 423564664320.

The previous prime is 1292994351941. The next prime is 1292994352021. The reversal of 1292994351972 is 2791534992921.

1292994351972 is a `hidden beast` number, since 1 + 2 + 9 + 2 + 9 + 9 + 43 + 519 + 72 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7048203 + ... + 7229325.

Almost surely, 2^{1292994351972} is an apocalyptic number.

1292994351972 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 1292994351972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1662403164240).

1292994351972 is an abundant number, since it is smaller than the sum of its proper divisors (2031811976508).

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

1292994351972 is a wasteful number, since it uses less digits than its factorization.

1292994351972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184553 (or 184548 counting only the distinct ones).

The product of its digits is 22044960, while the sum is 63.

The spelling of 1292994351972 in words is "one trillion, two hundred ninety-two billion, nine hundred ninety-four million, three hundred fifty-one thousand, nine hundred seventy-two".