1286257902 has 16 divisors (see below), whose sum is σ = 2573190912. Its totient is φ = 428640120.

The previous prime is 1286257897. The next prime is 1286257949. The reversal of 1286257902 is 2097526821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1408 + ... + 50739.

It is an arithmetic number, because the mean of its divisors is an integer number (160824432).

Almost surely, 2^1286257902 is an apocalyptic number.

1286257902 is an abundant number, since it is smaller than the sum of its proper divisors (1286933010).

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

1286257902 is a wasteful number, since it uses less digits than its factorization.

1286257902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56263.

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 1286257902 is about 35864.4378458662. The cubic root of 1286257902 is about 1087.5336041406.

The spelling of 1286257902 in words is "one billion, two hundred eighty-six million, two hundred fifty-seven thousand, nine hundred two".