1225780512 has 96 divisors (see below), whose sum is σ = 3716725824. Its totient is φ = 349593600.

The previous prime is 1225780463. The next prime is 1225780513. The reversal of 1225780512 is 2150875221.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (1225780513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16189 + ... + 52092.

It is an arithmetic number, because the mean of its divisors is an integer number (38715894).

Almost surely, 2^1225780512 is an apocalyptic number.

1225780512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1225780512 is an abundant number, since it is smaller than the sum of its proper divisors (2490945312).

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

1225780512 is a wasteful number, since it uses less digits than its factorization.

1225780512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68322 (or 68314 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 33.

The square root of 1225780512 is about 35011.1483959038. The cubic root of 1225780512 is about 1070.2146807722.

The spelling of 1225780512 in words is "one billion, two hundred twenty-five million, seven hundred eighty thousand, five hundred twelve".