1245115870 has 32 divisors (see below), whose sum is σ = 2454883200. Its totient is φ = 452583936.

The previous prime is 1245115811. The next prime is 1245115933. The reversal of 1245115870 is 785115421.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121350 + ... + 131209.

It is an arithmetic number, because the mean of its divisors is an integer number (76715100).

Almost surely, 2^1245115870 is an apocalyptic number.

1245115870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1245115870 is a deficient number, since it is larger than the sum of its proper divisors (1209767330).

1245115870 is a wasteful number, since it uses less digits than its factorization.

1245115870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252612.

The product of its (nonzero) digits is 11200, while the sum is 34.

The square root of 1245115870 is about 35286.1994269714. The cubic root of 1245115870 is about 1075.8125085027.

The spelling of 1245115870 in words is "one billion, two hundred forty-five million, one hundred fifteen thousand, eight hundred seventy".