1255380 has 96 divisors (see below), whose sum is σ = 4166400. Its totient is φ = 282240.

The previous prime is 1255367. The next prime is 1255391. The reversal of 1255380 is 835521.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1255380.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20550 + ... + 20610.

It is an arithmetic number, because the mean of its divisors is an integer number (43400).

2^1255380 is an apocalyptic number.

1255380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1255380 is the 915-th pentagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1255380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2083200).

1255380 is an abundant number, since it is smaller than the sum of its proper divisors (2911020).

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

1255380 is a wasteful number, since it uses less digits than its factorization.

1255380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 1255380 is about 1120.4374145841. The cubic root of 1255380 is about 107.8760580918.

The spelling of 1255380 in words is "one million, two hundred fifty-five thousand, three hundred eighty".