1565256 has 96 divisors (see below), whose sum is σ = 5006880. Its totient is φ = 406560.

The previous prime is 1565251. The next prime is 1565261. The reversal of 1565256 is 6525651.

1565256 = T₁₃ + T₁₄ + ... + T₂₁₀.

It is an interprime number because it is at equal distance from previous prime (1565251) and next prime (1565261).

It is not an unprimeable number, because it can be changed into a prime (1565251) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 142291 + ... + 142301.

It is an arithmetic number, because the mean of its divisors is an integer number (52155).

2^1565256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1565256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2503440).

1565256 is an abundant number, since it is smaller than the sum of its proper divisors (3441624).

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

1565256 is a wasteful number, since it uses less digits than its factorization.

1565256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56 (or 23 counting only the distinct ones).

The product of its digits is 9000, while the sum is 30.

The square root of 1565256 is about 1251.1019143139. The cubic root of 1565256 is about 116.1079059339.

The spelling of 1565256 in words is "one million, five hundred sixty-five thousand, two hundred fifty-six".