1280089245 has 16 divisors (see below), whose sum is σ = 2050053120. Its totient is φ = 682077504.

The previous prime is 1280089211. The next prime is 1280089277. The reversal of 1280089245 is 5429800821.

It is not a de Polignac number, because 1280089245 - 2²⁶ = 1212980381 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, 22950 + ... + 55559.

It is an arithmetic number, because the mean of its divisors is an integer number (128128320).

Almost surely, 2^1280089245 is an apocalyptic number.

1280089245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1280089245 is a deficient number, since it is larger than the sum of its proper divisors (769963875).

1280089245 is a wasteful number, since it uses less digits than its factorization.

1280089245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79604.

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 1280089245 is about 35778.3348550488. The cubic root of 1280089245 is about 1085.7922802390.

The spelling of 1280089245 in words is "one billion, two hundred eighty million, eighty-nine thousand, two hundred forty-five".