1297140807 has 16 divisors (see below), whose sum is σ = 1748498400. Its totient is φ = 855321600.

The previous prime is 1297140799. The next prime is 1297140809. The reversal of 1297140807 is 7080417921.

It is not a de Polignac number, because 1297140807 - 2³ = 1297140799 is a prime.

It is a super-2 number, since 2×1297140807² = 3365148546369222498, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297140809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101707 + ... + 113747.

It is an arithmetic number, because the mean of its divisors is an integer number (109281150).

Almost surely, 2^1297140807 is an apocalyptic number.

1297140807 is a deficient number, since it is larger than the sum of its proper divisors (451357593).

1297140807 is a wasteful number, since it uses less digits than its factorization.

1297140807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12434.

The product of its (nonzero) digits is 28224, while the sum is 39.

The square root of 1297140807 is about 36015.8410564018. The cubic root of 1297140807 is about 1090.5921668011.

The spelling of 1297140807 in words is "one billion, two hundred ninety-seven million, one hundred forty thousand, eight hundred seven".