1255125040 has 80 divisors (see below), whose sum is σ = 3173421888. Its totient is φ = 458892288.

The previous prime is 1255125037. The next prime is 1255125041. The reversal of 1255125040 is 405215521.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 1255124996 and 1255125014.

It is not an unprimeable number, because it can be changed into a prime (1255125041) 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, 101262 + ... + 112978.

Almost surely, 2^1255125040 is an apocalyptic number.

1255125040 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 1255125040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1586710944).

1255125040 is an abundant number, since it is smaller than the sum of its proper divisors (1918296848).

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

1255125040 is a wasteful number, since it uses less digits than its factorization.

1255125040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11846 (or 11840 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 1255125040 is about 35427.7439304283. The cubic root of 1255125040 is about 1078.6875460809.

The spelling of 1255125040 in words is "one billion, two hundred fifty-five million, one hundred twenty-five thousand, forty".