1255158720 has 224 divisors, whose sum is σ = 4513112640. Its totient is φ = 328273920.

The previous prime is 1255158719. The next prime is 1255158731. The reversal of 1255158720 is 278515521.

1255158720 is a `hidden beast` number, since 1 + 2 + 5 + 51 + 587 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 456550 + ... + 459290.

Almost surely, 2^1255158720 is an apocalyptic number.

1255158720 is a gapful number since it is divisible by the number (10) 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 1255158720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2256556320).

1255158720 is an abundant number, since it is smaller than the sum of its proper divisors (3257953920).

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

1255158720 is a wasteful number, since it uses less digits than its factorization.

1255158720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2820 (or 2804 counting only the distinct ones).

The product of its (nonzero) digits is 28000, while the sum is 36.

The square root of 1255158720 is about 35428.2192609225. The cubic root of 1255158720 is about 1078.6971944879.

The spelling of 1255158720 in words is "one billion, two hundred fifty-five million, one hundred fifty-eight thousand, seven hundred twenty".