1296865827 has 6 divisors (see below), whose sum is σ = 1873250652. Its totient is φ = 864577212.

The previous prime is 1296865807. The next prime is 1296865831. The reversal of 1296865827 is 7285686921.

It is not a de Polignac number, because 1296865827 - 2⁷ = 1296865699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1296865807) 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, 72048093 + ... + 72048110.

It is an arithmetic number, because the mean of its divisors is an integer number (312208442).

Almost surely, 2^1296865827 is an apocalyptic number.

1296865827 is a deficient number, since it is larger than the sum of its proper divisors (576384825).

1296865827 is a wasteful number, since it uses less digits than its factorization.

1296865827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144096209 (or 144096206 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The square root of 1296865827 is about 36012.0233672033. The cubic root of 1296865827 is about 1090.5150967236.

The spelling of 1296865827 in words is "one billion, two hundred ninety-six million, eight hundred sixty-five thousand, eight hundred twenty-seven".