1297520641 has 8 divisors (see below), whose sum is σ = 1304832320. Its totient is φ = 1290223728.

The previous prime is 1297520617. The next prime is 1297520647. The reversal of 1297520641 is 1460257921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1297520641 - 2⁷ = 1297520513 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 1297520641.

It is not an unprimeable number, because it can be changed into a prime (1297520647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204580 + ... + 210826.

It is an arithmetic number, because the mean of its divisors is an integer number (163104040).

Almost surely, 2^1297520641 is an apocalyptic number.

It is an amenable number.

1297520641 is a deficient number, since it is larger than the sum of its proper divisors (7311679).

1297520641 is an equidigital number, since it uses as much as digits as its factorization.

1297520641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7383.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 1297520641 is about 36021.1138223126. The cubic root of 1297520641 is about 1090.6986069439.

The spelling of 1297520641 in words is "one billion, two hundred ninety-seven million, five hundred twenty thousand, six hundred forty-one".