1256616 has 48 divisors (see below), whose sum is σ = 3519360. Its totient is φ = 404640.

The previous prime is 1256611. The next prime is 1256617. The reversal of 1256616 is 6166521.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1256616.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1951 + ... + 2513.

It is an arithmetic number, because the mean of its divisors is an integer number (73320).

2^1256616 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 1256616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1759680).

1256616 is an abundant number, since it is smaller than the sum of its proper divisors (2262744).

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

1256616 is a wasteful number, since it uses less digits than its factorization.

1256616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606 (or 599 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 1256616 is about 1120.9888491863. The cubic root of 1256616 is about 107.9114500509.

The spelling of 1256616 in words is "one million, two hundred fifty-six thousand, six hundred sixteen".