1255320520 has 32 divisors (see below), whose sum is σ = 2837157120. Its totient is φ = 499872960.

The previous prime is 1255320499. The next prime is 1255320581. The reversal of 1255320520 is 250235521.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61446 + ... + 79285.

It is an arithmetic number, because the mean of its divisors is an integer number (88661160).

Almost surely, 2^1255320520 is an apocalyptic number.

1255320520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1255320520 is an abundant number, since it is smaller than the sum of its proper divisors (1581836600).

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

1255320520 is a wasteful number, since it uses less digits than its factorization.

1255320520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140965 (or 140961 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 1255320520 is about 35430.5026777775. The cubic root of 1255320520 is about 1078.7435433956.

The spelling of 1255320520 in words is "one billion, two hundred fifty-five million, three hundred twenty thousand, five hundred twenty".