1225863312 has 40 divisors (see below), whose sum is σ = 3173171904. Its totient is φ = 407800704.

The previous prime is 1225863281. The next prime is 1225863329. The reversal of 1225863312 is 2133685221.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1243 + ... + 49530.

Almost surely, 2^1225863312 is an apocalyptic number.

1225863312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1225863312 is an abundant number, since it is smaller than the sum of its proper divisors (1947308592).

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

1225863312 is a wasteful number, since it uses less digits than its factorization.

1225863312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51287 (or 51281 counting only the distinct ones).

The product of its digits is 17280, while the sum is 33.

The square root of 1225863312 is about 35012.3308564283. The cubic root of 1225863312 is about 1070.2387774680.

The spelling of 1225863312 in words is "one billion, two hundred twenty-five million, eight hundred sixty-three thousand, three hundred twelve".