1296191215 has 32 divisors (see below), whose sum is σ = 1754224704. Its totient is φ = 911139840.

The previous prime is 1296191213. The next prime is 1296191227. The reversal of 1296191215 is 5121916921.

It is not a de Polignac number, because 1296191215 - 2¹ = 1296191213 is a prime.

It is a super-2 number, since 2×1296191215² = 3360223331686352450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1296191213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 317467 + ... + 321523.

It is an arithmetic number, because the mean of its divisors is an integer number (54819522).

Almost surely, 2^1296191215 is an apocalyptic number.

1296191215 is a deficient number, since it is larger than the sum of its proper divisors (458033489).

1296191215 is a wasteful number, since it uses less digits than its factorization.

1296191215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4267.

The product of its digits is 9720, while the sum is 37.

The square root of 1296191215 is about 36002.6556659366. The cubic root of 1296191215 is about 1090.3259735430.

The spelling of 1296191215 in words is "one billion, two hundred ninety-six million, one hundred ninety-one thousand, two hundred fifteen".