1296901239 has 4 divisors (see below), whose sum is σ = 1729201656. Its totient is φ = 864600824.

The previous prime is 1296901211. The next prime is 1296901261. The reversal of 1296901239 is 9321096921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9321096921 = 3 ⋅3107032307.

It is a cyclic number.

It is not a de Polignac number, because 1296901239 - 2¹² = 1296897143 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1296901239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1296901279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216150204 + ... + 216150209.

It is an arithmetic number, because the mean of its divisors is an integer number (432300414).

Almost surely, 2^1296901239 is an apocalyptic number.

1296901239 is a deficient number, since it is larger than the sum of its proper divisors (432300417).

1296901239 is an equidigital number, since it uses as much as digits as its factorization.

1296901239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432300416.

The product of its (nonzero) digits is 52488, while the sum is 42.

The square root of 1296901239 is about 36012.5150329715. The cubic root of 1296901239 is about 1090.5250224404.

The spelling of 1296901239 in words is "one billion, two hundred ninety-six million, nine hundred one thousand, two hundred thirty-nine".