1255532520 has 64 divisors (see below), whose sum is σ = 4109019840. Its totient is φ = 304371200.

The previous prime is 1255532513. The next prime is 1255532549. The reversal of 1255532520 is 252355521.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 474261 + ... + 476900.

It is an arithmetic number, because the mean of its divisors is an integer number (64203435).

Almost surely, 2^1255532520 is an apocalyptic number.

1255532520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1255532520 is an abundant number, since it is smaller than the sum of its proper divisors (2853487320).

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

1255532520 is a wasteful number, since it uses less digits than its factorization.

1255532520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951186 (or 951182 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 30.

The square root of 1255532520 is about 35433.4943238738. The cubic root of 1255532520 is about 1078.8042664685.

The spelling of 1255532520 in words is "one billion, two hundred fifty-five million, five hundred thirty-two thousand, five hundred twenty".