1297499994 has 24 divisors (see below), whose sum is σ = 3212857440. Its totient is φ = 370714248.

The previous prime is 1297499969. The next prime is 1297500023. The reversal of 1297499994 is 4999947921.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5148684 + ... + 5148935.

It is an arithmetic number, because the mean of its divisors is an integer number (133869060).

Almost surely, 2^1297499994 is an apocalyptic number.

1297499994 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1297499994 is an abundant number, since it is smaller than the sum of its proper divisors (1915357446).

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

1297499994 is a wasteful number, since it uses less digits than its factorization.

1297499994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10297634 (or 10297631 counting only the distinct ones).

The product of its digits is 13226976, while the sum is 63.

The square root of 1297499994 is about 36020.8272253706. The cubic root of 1297499994 is about 1090.6928216092.

The spelling of 1297499994 in words is "one billion, two hundred ninety-seven million, four hundred ninety-nine thousand, nine hundred ninety-four".