1297039942 has 16 divisors (see below), whose sum is σ = 2122989264. Its totient is φ = 589408000.

The previous prime is 1297039873. The next prime is 1297039949. The reversal of 1297039942 is 2499307921.

It is a happy number.

It is a super-2 number, since 2×1297039942² = 3364625222286726728, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1297039892 and 1297039901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297039949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138942 + ... + 147982.

It is an arithmetic number, because the mean of its divisors is an integer number (132686829).

Almost surely, 2^1297039942 is an apocalyptic number.

1297039942 is a deficient number, since it is larger than the sum of its proper divisors (825949322).

1297039942 is a wasteful number, since it uses less digits than its factorization.

1297039942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15575.

The product of its (nonzero) digits is 244944, while the sum is 46.

The square root of 1297039942 is about 36014.4407425688. The cubic root of 1297039942 is about 1090.5638981069.

The spelling of 1297039942 in words is "one billion, two hundred ninety-seven million, thirty-nine thousand, nine hundred forty-two".