1255115140 has 24 divisors (see below), whose sum is σ = 2644229952. Its totient is φ = 500429280.

The previous prime is 1255115123. The next prime is 1255115149. The reversal of 1255115140 is 415115521.

It is not an unprimeable number, because it can be changed into a prime (1255115149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94674 + ... + 107113.

It is an arithmetic number, because the mean of its divisors is an integer number (110176248).

Almost surely, 2^1255115140 is an apocalyptic number.

1255115140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1255115140 is an abundant number, since it is smaller than the sum of its proper divisors (1389114812).

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

1255115140 is a wasteful number, since it uses less digits than its factorization.

1255115140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202107 (or 202105 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 25.

The square root of 1255115140 is about 35427.6042091474. The cubic root of 1255115140 is about 1078.6847099665.

The spelling of 1255115140 in words is "one billion, two hundred fifty-five million, one hundred fifteen thousand, one hundred forty".