1289672485 has 16 divisors (see below), whose sum is σ = 1602422640. Its totient is φ = 995258880.

The previous prime is 1289672467. The next prime is 1289672561. The reversal of 1289672485 is 5842769821.

It can be written as a sum of positive squares in 8 ways, for example, as 354719556 + 934952929 = 18834^2 + 30577^2 .

It is not a de Polignac number, because 1289672485 - 2⁷ = 1289672357 is a prime.

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, 188179 + ... + 194911.

It is an arithmetic number, because the mean of its divisors is an integer number (100151415).

Almost surely, 2^1289672485 is an apocalyptic number.

It is an amenable number.

1289672485 is a deficient number, since it is larger than the sum of its proper divisors (312750155).

1289672485 is a wasteful number, since it uses less digits than its factorization.

1289672485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8088.

The product of its digits is 1935360, while the sum is 52.

The square root of 1289672485 is about 35912.0103168842. The cubic root of 1289672485 is about 1088.4950993897.

The spelling of 1289672485 in words is "one billion, two hundred eighty-nine million, six hundred seventy-two thousand, four hundred eighty-five".