1299080641 has 6 divisors (see below), whose sum is σ = 1358018690. Its totient is φ = 1242598368.

The previous prime is 1299080623. The next prime is 1299080659. The reversal of 1299080641 is 1460809921.

It is an interprime number because it is at equal distance from previous prime (1299080623) and next prime (1299080659).

It can be written as a sum of positive squares in only one way, i.e., 1074200625 + 224880016 = 32775^2 + 14996^2 .

It is not a de Polignac number, because 1299080641 - 2⁵ = 1299080609 is a prime.

It is a super-2 number, since 2×1299080641² = 3375221023641941762, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1299080594 and 1299080603.

It is not an unprimeable number, because it can be changed into a prime (1299080441) 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, 1227336 + ... + 1228393.

Almost surely, 2^1299080641 is an apocalyptic number.

It is an amenable number.

1299080641 is a deficient number, since it is larger than the sum of its proper divisors (58938049).

1299080641 is an equidigital number, since it uses as much as digits as its factorization.

1299080641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2455775 (or 2455752 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 1299080641 is about 36042.7612843411. The cubic root of 1299080641 is about 1091.1355449860.

The spelling of 1299080641 in words is "one billion, two hundred ninety-nine million, eighty thousand, six hundred forty-one".