1286099872 has 48 divisors (see below), whose sum is σ = 2612639232. Its totient is φ = 622736640.

The previous prime is 1286099839. The next prime is 1286099879. The reversal of 1286099872 is 2789906821.

It is not an unprimeable number, because it can be changed into a prime (1286099879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261597 + ... + 266467.

It is an arithmetic number, because the mean of its divisors is an integer number (54429984).

Almost surely, 2^1286099872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1286099872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1306319616).

1286099872 is an abundant number, since it is smaller than the sum of its proper divisors (1326539360).

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

1286099872 is a wasteful number, since it uses less digits than its factorization.

1286099872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5141 (or 5133 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 52.

The square root of 1286099872 is about 35862.2346208376. The cubic root of 1286099872 is about 1087.4890640905.

The spelling of 1286099872 in words is "one billion, two hundred eighty-six million, ninety-nine thousand, eight hundred seventy-two".