1297515707 has 4 divisors (see below), whose sum is σ = 1298015640. Its totient is φ = 1297015776.

The previous prime is 1297515683. The next prime is 1297515727. The reversal of 1297515707 is 7075157921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1297515707 - 2⁸ = 1297515451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1297515727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 246053 + ... + 251270.

It is an arithmetic number, because the mean of its divisors is an integer number (324503910).

Almost surely, 2^1297515707 is an apocalyptic number.

1297515707 is a deficient number, since it is larger than the sum of its proper divisors (499933).

1297515707 is an equidigital number, since it uses as much as digits as its factorization.

1297515707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499932.

The product of its (nonzero) digits is 154350, while the sum is 44.

The square root of 1297515707 is about 36021.0453346374. The cubic root of 1297515707 is about 1090.6972244318.

It can be divided in two parts, 12975 and 15707, that added together give a palindrome (28682).

The spelling of 1297515707 in words is "one billion, two hundred ninety-seven million, five hundred fifteen thousand, seven hundred seven".