1278952902 has 20 divisors (see below), whose sum is σ = 2865802236. Its totient is φ = 426317580.

The previous prime is 1278952849. The next prime is 1278952903. The reversal of 1278952902 is 2092598721.

It is a happy number.

1278952902 is a `hidden beast` number, since 1 + 278 + 95 + 290 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1278952903) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3947224 + ... + 3947547.

Almost surely, 2^1278952902 is an apocalyptic number.

1278952902 is an abundant number, since it is smaller than the sum of its proper divisors (1586849334).

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

1278952902 is an equidigital number, since it uses as much as digits as its factorization.

1278952902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7894785 (or 7894776 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 1278952902 is about 35762.4510066075. The cubic root of 1278952902 is about 1085.4708969877.

The spelling of 1278952902 in words is "one billion, two hundred seventy-eight million, nine hundred fifty-two thousand, nine hundred two".