255742520 has 128 divisors (see below), whose sum is σ = 673712640. Its totient is φ = 86423040.

The previous prime is 255742507. The next prime is 255742541. The reversal of 255742520 is 25247552.

255742520 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 374099 + ... + 374781.

It is an arithmetic number, because the mean of its divisors is an integer number (5263380).

Almost surely, 2^255742520 is an apocalyptic number.

255742520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255742520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (336856320).

255742520 is an abundant number, since it is smaller than the sum of its proper divisors (417970120).

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

255742520 is a wasteful number, since it uses less digits than its factorization.

255742520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765 (or 761 counting only the distinct ones).

The product of its (nonzero) digits is 28000, while the sum is 32.

The square root of 255742520 is about 15991.9517257901. The cubic root of 255742520 is about 634.7474722829.

The spelling of 255742520 in words is "two hundred fifty-five million, seven hundred forty-two thousand, five hundred twenty".