1289674685 has 16 divisors (see below), whose sum is σ = 1754376960. Its totient is φ = 902249280.

The previous prime is 1289674649. The next prime is 1289674709. The reversal of 1289674685 is 5864769821.

It is a happy number.

It is not a de Polignac number, because 1289674685 - 2¹⁰ = 1289673661 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1289674685.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 520901 + ... + 523370.

It is an arithmetic number, because the mean of its divisors is an integer number (109648560).

Almost surely, 2^1289674685 is an apocalyptic number.

It is an amenable number.

1289674685 is a deficient number, since it is larger than the sum of its proper divisors (464702275).

1289674685 is a wasteful number, since it uses less digits than its factorization.

1289674685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044308.

The product of its digits is 5806080, while the sum is 56.

The square root of 1289674685 is about 35912.0409472923. The cubic root of 1289674685 is about 1088.4957183292.

The spelling of 1289674685 in words is "one billion, two hundred eighty-nine million, six hundred seventy-four thousand, six hundred eighty-five".