1291515214 has 24 divisors (see below), whose sum is σ = 2123776152. Its totient is φ = 584179920.

The previous prime is 1291515193. The next prime is 1291515217. The reversal of 1291515214 is 4125151921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1291515217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1761592 + ... + 1762324.

It is an arithmetic number, because the mean of its divisors is an integer number (88490673).

Almost surely, 2^1291515214 is an apocalyptic number.

1291515214 is a deficient number, since it is larger than the sum of its proper divisors (832260938).

1291515214 is an equidigital number, since it uses as much as digits as its factorization.

1291515214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1312 (or 1029 counting only the distinct ones).

The product of its digits is 3600, while the sum is 31.

The square root of 1291515214 is about 35937.6573248730. The cubic root of 1291515214 is about 1089.0132792499.

The spelling of 1291515214 in words is "one billion, two hundred ninety-one million, five hundred fifteen thousand, two hundred fourteen".