1291288914 has 12 divisors (see below), whose sum is σ = 2797792686. Its totient is φ = 430429632.

The previous prime is 1291288913. The next prime is 1291288919. The reversal of 1291288914 is 4198821921.

It can be written as a sum of positive squares in only one way, i.e., 1076168025 + 215120889 = 32805^2 + 14667^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1291288914.

It is not an unprimeable number, because it can be changed into a prime (1291288913) 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, 35869119 + ... + 35869154.

Almost surely, 2^1291288914 is an apocalyptic number.

1291288914 is an abundant number, since it is smaller than the sum of its proper divisors (1506503772).

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

1291288914 is a wasteful number, since it uses less digits than its factorization.

1291288914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71738281 (or 71738278 counting only the distinct ones).

The product of its digits is 82944, while the sum is 45.

The square root of 1291288914 is about 35934.5086789843. The cubic root of 1291288914 is about 1088.9496697010.

The spelling of 1291288914 in words is "one billion, two hundred ninety-one million, two hundred eighty-eight thousand, nine hundred fourteen".