1224875856 has 40 divisors (see below), whose sum is σ = 3301842240. Its totient is φ = 390539776.

The previous prime is 1224875801. The next prime is 1224875867. The reversal of 1224875856 is 6585784221.

It is a super-2 number, since 2×1224875856² = 3000641725223465472, which contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 553641 + ... + 555848.

It is an arithmetic number, because the mean of its divisors is an integer number (82546056).

Almost surely, 2^1224875856 is an apocalyptic number.

1224875856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1224875856 is an abundant number, since it is smaller than the sum of its proper divisors (2076966384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1224875856 is a wasteful number, since it uses less digits than its factorization.

1224875856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1109523 (or 1109517 counting only the distinct ones).

The product of its digits is 1075200, while the sum is 48.

The square root of 1224875856 is about 34998.2264693513. The cubic root of 1224875856 is about 1069.9513344390.

The spelling of 1224875856 in words is "one billion, two hundred twenty-four million, eight hundred seventy-five thousand, eight hundred fifty-six".