1245908880 has 60 divisors (see below), whose sum is σ = 4184179740. Its totient is φ = 332242176.

The previous prime is 1245908821. The next prime is 1245908893. The reversal of 1245908880 is 888095421.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 337971456 + 907937424 = 18384^2 + 30132^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Smith number, since the sum of its digits (45) 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 (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 864495 + ... + 865934.

It is an arithmetic number, because the mean of its divisors is an integer number (69736329).

Almost surely, 2^1245908880 is an apocalyptic number.

1245908880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1245908880 is an abundant number, since it is smaller than the sum of its proper divisors (2938270860).

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

1245908880 is a wasteful number, since it uses less digits than its factorization.

1245908880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1730448 (or 1730439 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 45.

The square root of 1245908880 is about 35297.4344676777. The cubic root of 1245908880 is about 1076.0408537899.

The spelling of 1245908880 in words is "one billion, two hundred forty-five million, nine hundred eight thousand, eight hundred eighty".