1125640640 has 56 divisors (see below), whose sum is σ = 2752904832. Its totient is φ = 438082560.

The previous prime is 1125640619. The next prime is 1125640651. The reversal of 1125640640 is 460465211.

It is a congruent number.

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, 35696 + ... + 59375.

Almost surely, 2^1125640640 is an apocalyptic number.

1125640640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1125640640 is an abundant number, since it is smaller than the sum of its proper divisors (1627264192).

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

1125640640 is an equidigital number, since it uses as much as digits as its factorization.

1125640640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95125 (or 95115 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 1125640640 is about 33550.5684005502. The cubic root of 1125640640 is about 1040.2392940489.

The spelling of 1125640640 in words is "one billion, one hundred twenty-five million, six hundred forty thousand, six hundred forty".