1255002140 has 48 divisors (see below), whose sum is σ = 3109177344. Its totient is φ = 416404800.

The previous prime is 1255002127. The next prime is 1255002143. The reversal of 1255002140 is 412005521.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255002143) 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, 140246 + ... + 148925.

It is an arithmetic number, because the mean of its divisors is an integer number (64774528).

Almost surely, 2^1255002140 is an apocalyptic number.

1255002140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1255002140 is an abundant number, since it is smaller than the sum of its proper divisors (1854175204).

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

1255002140 is a wasteful number, since it uses less digits than its factorization.

1255002140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289218 (or 289216 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 1255002140 is about 35426.0093716467. The cubic root of 1255002140 is about 1078.6523370984.

Adding to 1255002140 its reverse (412005521), we get a palindrome (1667007661).

The spelling of 1255002140 in words is "one billion, two hundred fifty-five million, two thousand, one hundred forty".