1297426392 has 48 divisors (see below), whose sum is σ = 3528490680. Its totient is φ = 430675200.

The previous prime is 1297426387. The next prime is 1297426393. The reversal of 1297426392 is 2936247921.

1297426392 is a `hidden beast` number, since 1 + 2 + 9 + 7 + 4 + 2 + 639 + 2 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297426393) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20034 + ... + 54737.

Almost surely, 2^1297426392 is an apocalyptic number.

1297426392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1297426392 is an abundant number, since it is smaller than the sum of its proper divisors (2231064288).

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

1297426392 is a wasteful number, since it uses less digits than its factorization.

1297426392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75024 (or 75017 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 1297426392 is about 36019.8055519460. The cubic root of 1297426392 is about 1090.6721976679.

The spelling of 1297426392 in words is "one billion, two hundred ninety-seven million, four hundred twenty-six thousand, three hundred ninety-two".