1297312741 has 4 divisors (see below), whose sum is σ = 1297389312. Its totient is φ = 1297236172.

The previous prime is 1297312733. The next prime is 1297312777. The reversal of 1297312741 is 1472137921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1472137921 = 8419 ⋅174859.

It is a cyclic number.

It is not a de Polignac number, because 1297312741 - 2³ = 1297312733 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1297312741.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297310741) 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, 325 + ... + 50938.

It is an arithmetic number, because the mean of its divisors is an integer number (324347328).

Almost surely, 2^1297312741 is an apocalyptic number.

It is an amenable number.

1297312741 is a deficient number, since it is larger than the sum of its proper divisors (76571).

1297312741 is an equidigital number, since it uses as much as digits as its factorization.

1297312741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76570.

The product of its digits is 21168, while the sum is 37.

The square root of 1297312741 is about 36018.2278992179. The cubic root of 1297312741 is about 1090.6403501051.

The spelling of 1297312741 in words is "one billion, two hundred ninety-seven million, three hundred twelve thousand, seven hundred forty-one".