1125257840 has 160 divisors (see below), whose sum is σ = 3147227136. Its totient is φ = 366013440.

The previous prime is 1125257839. The next prime is 1125257851. The reversal of 1125257840 is 487525211.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 1125257840.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 919469 + ... + 920691.

Almost surely, 2^1125257840 is an apocalyptic number.

1125257840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1125257840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1573613568).

1125257840 is an abundant number, since it is smaller than the sum of its proper divisors (2021969296).

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

1125257840 is a wasteful number, since it uses less digits than its factorization.

1125257840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1327 (or 1321 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 35.

The square root of 1125257840 is about 33544.8630940715. The cubic root of 1125257840 is about 1040.1213615769.

The spelling of 1125257840 in words is "one billion, one hundred twenty-five million, two hundred fifty-seven thousand, eight hundred forty".