1297620971 has 4 divisors (see below), whose sum is σ = 1339479744. Its totient is φ = 1255762200.

The previous prime is 1297620901. The next prime is 1297620977. The reversal of 1297620971 is 1790267921.

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 1297620971 - 2¹⁴ = 1297604587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1297620977) 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, 20929340 + ... + 20929401.

It is an arithmetic number, because the mean of its divisors is an integer number (334869936).

Almost surely, 2^1297620971 is an apocalyptic number.

1297620971 is a deficient number, since it is larger than the sum of its proper divisors (41858773).

1297620971 is an equidigital number, since it uses as much as digits as its factorization.

1297620971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41858772.

The product of its (nonzero) digits is 95256, while the sum is 44.

The square root of 1297620971 is about 36022.5064508288. The cubic root of 1297620971 is about 1090.7267187564.

The spelling of 1297620971 in words is "one billion, two hundred ninety-seven million, six hundred twenty thousand, nine hundred seventy-one".