1279052685 has 24 divisors (see below), whose sum is σ = 2293476120. Its totient is φ = 658637952.

The previous prime is 1279052651. The next prime is 1279052729. The reversal of 1279052685 is 5862509721.

It can be written as a sum of positive squares in 4 ways, for example, as 452030121 + 827022564 = 21261^2 + 28758^2 .

It is not a de Polignac number, because 1279052685 - 2⁷ = 1279052557 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1279052685.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 488754 + ... + 491363.

It is an arithmetic number, because the mean of its divisors is an integer number (95561505).

Almost surely, 2^1279052685 is an apocalyptic number.

1279052685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1279052685 is a deficient number, since it is larger than the sum of its proper divisors (1014423435).

1279052685 is a wasteful number, since it uses less digits than its factorization.

1279052685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980157 (or 980154 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The square root of 1279052685 is about 35763.8460599528. The cubic root of 1279052685 is about 1085.4991254772.

The spelling of 1279052685 in words is "one billion, two hundred seventy-nine million, fifty-two thousand, six hundred eighty-five".