1297675465 has 4 divisors (see below), whose sum is σ = 1557210564. Its totient is φ = 1038140368.

The previous prime is 1297675429. The next prime is 1297675487. The reversal of 1297675465 is 5645767921.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1006665984 + 291009481 = 31728^2 + 17059^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1297675465 is a prime.

It is a super-2 number, since 2×1297675465² = 3367923224925932450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129767542 + ... + 129767551.

It is an arithmetic number, because the mean of its divisors is an integer number (389302641).

Almost surely, 2^1297675465 is an apocalyptic number.

It is an amenable number.

1297675465 is a deficient number, since it is larger than the sum of its proper divisors (259535099).

1297675465 is an equidigital number, since it uses as much as digits as its factorization.

1297675465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259535098.

The product of its digits is 3175200, while the sum is 52.

The square root of 1297675465 is about 36023.2628311207. The cubic root of 1297675465 is about 1090.7419870129.

The spelling of 1297675465 in words is "one billion, two hundred ninety-seven million, six hundred seventy-five thousand, four hundred sixty-five".