1296644274 has 80 divisors (see below), whose sum is σ = 3102656832. Its totient is φ = 403758432.

The previous prime is 1296644267. The next prime is 1296644287. The reversal of 1296644274 is 4724466921.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 156172 + ... + 164264.

Almost surely, 2^1296644274 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1296644274, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1551328416).

1296644274 is an abundant number, since it is smaller than the sum of its proper divisors (1806012558).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1296644274 is a wasteful number, since it uses less digits than its factorization.

1296644274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8173 (or 8164 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 1296644274 is about 36008.9471381766. The cubic root of 1296644274 is about 1090.4529929844.

The spelling of 1296644274 in words is "one billion, two hundred ninety-six million, six hundred forty-four thousand, two hundred seventy-four".