1297387841 has 6 divisors (see below), whose sum is σ = 1356249090. Its totient is φ = 1240979168.

The previous prime is 1297387837. The next prime is 1297387843. The reversal of 1297387841 is 1487837921.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1222201600 + 75186241 = 34960^2 + 8671^2 .

It is not a de Polignac number, because 1297387841 - 2² = 1297387837 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 1297387841.

It is not an unprimeable number, because it can be changed into a prime (1297387843) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1225736 + ... + 1226793.

It is an arithmetic number, because the mean of its divisors is an integer number (226041515).

Almost surely, 2^1297387841 is an apocalyptic number.

It is an amenable number.

1297387841 is a deficient number, since it is larger than the sum of its proper divisors (58861249).

1297387841 is an equidigital number, since it uses as much as digits as its factorization.

1297387841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2452575 (or 2452552 counting only the distinct ones).

The product of its digits is 677376, while the sum is 50.

The square root of 1297387841 is about 36019.2704118226. The cubic root of 1297387841 is about 1090.6613950203.

The spelling of 1297387841 in words is "one billion, two hundred ninety-seven million, three hundred eighty-seven thousand, eight hundred forty-one".