1255858340 has 96 divisors (see below), whose sum is σ = 3151612800. Its totient is φ = 414955520.

The previous prime is 1255858319. The next prime is 1255858343. The reversal of 1255858340 is 438585521.

It is not an unprimeable number, because it can be changed into a prime (1255858343) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 102671 + ... + 114249.

It is an arithmetic number, because the mean of its divisors is an integer number (32829300).

Almost surely, 2^1255858340 is an apocalyptic number.

1255858340 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 1255858340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1575806400).

1255858340 is an abundant number, since it is smaller than the sum of its proper divisors (1895754460).

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

1255858340 is a wasteful number, since it uses less digits than its factorization.

1255858340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11645 (or 11643 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 41.

The square root of 1255858340 is about 35438.0916529093. The cubic root of 1255858340 is about 1078.8975776332.

The spelling of 1255858340 in words is "one billion, two hundred fifty-five million, eight hundred fifty-eight thousand, three hundred forty".