1255405660 has 12 divisors (see below), whose sum is σ = 2636351928. Its totient is φ = 502162256.

The previous prime is 1255405643. The next prime is 1255405687. The reversal of 1255405660 is 665045521.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31385122 + ... + 31385161.

It is an arithmetic number, because the mean of its divisors is an integer number (219695994).

Almost surely, 2^1255405660 is an apocalyptic number.

1255405660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1255405660 is an abundant number, since it is smaller than the sum of its proper divisors (1380946268).

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

1255405660 is a wasteful number, since it uses less digits than its factorization.

1255405660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62770292 (or 62770290 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 1255405660 is about 35431.7041644909. The cubic root of 1255405660 is about 1078.7679308323.

The spelling of 1255405660 in words is "one billion, two hundred fifty-five million, four hundred five thousand, six hundred sixty".