1279964085 has 32 divisors (see below), whose sum is σ = 2176958592. Its totient is φ = 639959040.

The previous prime is 1279964057. The next prime is 1279964111. The reversal of 1279964085 is 5804699721.

1279964085 = 2659² + 2660² + ... + 2828².

1279964085 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1279964085 - 2¹⁴ = 1279947701 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55770 + ... + 75300.

It is an arithmetic number, because the mean of its divisors is an integer number (68029956).

Almost surely, 2^1279964085 is an apocalyptic number.

1279964085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1279964085 is a deficient number, since it is larger than the sum of its proper divisors (896994507).

1279964085 is a wasteful number, since it uses less digits than its factorization.

1279964085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19813.

The product of its (nonzero) digits is 1088640, while the sum is 51.

The square root of 1279964085 is about 35776.5857090919. The cubic root of 1279964085 is about 1085.7568915108.

The spelling of 1279964085 in words is "one billion, two hundred seventy-nine million, nine hundred sixty-four thousand, eighty-five".