1255620 has 48 divisors (see below), whose sum is σ = 3725568. Its totient is φ = 314880.

The previous prime is 1255619. The next prime is 1255633. The reversal of 1255620 is 265521.

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, 405 + ... + 1635.

It is an arithmetic number, because the mean of its divisors is an integer number (77616).

2^1255620 is an apocalyptic number.

1255620 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 1255620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1862784).

1255620 is an abundant number, since it is smaller than the sum of its proper divisors (2469948).

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

1255620 is a wasteful number, since it uses less digits than its factorization.

1255620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1260 (or 1258 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 1255620 is about 1120.5445104948. The cubic root of 1255620 is about 107.8829321337.

Subtracting from 1255620 its reverse (265521), we obtain a palindrome (990099).

The spelling of 1255620 in words is "one million, two hundred fifty-five thousand, six hundred twenty".