1297972171 has 4 divisors (see below), whose sum is σ = 1298989872. Its totient is φ = 1296954472.

The previous prime is 1297972147. The next prime is 1297972183. The reversal of 1297972171 is 1712797921.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1712797921 = 19 ⋅90147259.

It is a cyclic number.

It is not a de Polignac number, because 1297972171 - 2⁷ = 1297972043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1297972141) 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, 506935 + ... + 509488.

It is an arithmetic number, because the mean of its divisors is an integer number (324747468).

Almost surely, 2^1297972171 is an apocalyptic number.

1297972171 is a deficient number, since it is larger than the sum of its proper divisors (1017701).

1297972171 is a wasteful number, since it uses less digits than its factorization.

1297972171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017700.

The product of its digits is 111132, while the sum is 46.

The square root of 1297972171 is about 36027.3808512359. The cubic root of 1297972171 is about 1090.8251112965.

The spelling of 1297972171 in words is "one billion, two hundred ninety-seven million, nine hundred seventy-two thousand, one hundred seventy-one".