2256989 has 6 divisors (see below), whose sum is σ = 2625534. Its totient is φ = 1934520.

The previous prime is 2256973. The next prime is 2257001. The reversal of 2256989 is 9896522.

It can be written as a sum of positive squares in only one way, i.e., 1416100 + 840889 = 1190^2 + 917^2 .

It is not a de Polignac number, because 2256989 - 2⁴ = 2256973 is a prime.

It is a super-2 number, since 2×2256989² = 10187998692242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2256959) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22982 + ... + 23079.

It is an arithmetic number, because the mean of its divisors is an integer number (437589).

2^2256989 is an apocalyptic number.

It is an amenable number.

2256989 is a deficient number, since it is larger than the sum of its proper divisors (368545).

2256989 is an equidigital number, since it uses as much as digits as its factorization.

2256989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46075 (or 46068 counting only the distinct ones).

The product of its digits is 77760, while the sum is 41.

The square root of 2256989 is about 1502.3278603554. The cubic root of 2256989 is about 131.1726062243.

The spelling of 2256989 in words is "two million, two hundred fifty-six thousand, nine hundred eighty-nine".