2256637 has 2 divisors, whose sum is σ = 2256638. Its totient is φ = 2256636.

The previous prime is 2256629. The next prime is 2256673. The reversal of 2256637 is 7366522.

Together with next prime (2256673) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1879641 + 376996 = 1371^2 + 614^2 .

It is a cyclic number.

It is not a de Polignac number, because 2256637 - 2³ = 2256629 is a prime.

It is a d-powerful number, because it can be written as 2¹⁵ + 2¹⁹ + 5⁵ + 6 + 6⁸ + 3³ + 7⁵ .

It is a junction number, because it is equal to n+sod(n) for n = 2256599 and 2256608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2256677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1128318 + 1128319.

It is an arithmetic number, because the mean of its divisors is an integer number (1128319).

2^2256637 is an apocalyptic number.

It is an amenable number.

2256637 is a deficient number, since it is larger than the sum of its proper divisors (1).

2256637 is an equidigital number, since it uses as much as digits as its factorization.

2256637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 31.

The square root of 2256637 is about 1502.2107042622. The cubic root of 2256637 is about 131.1657866433.

The spelling of 2256637 in words is "two million, two hundred fifty-six thousand, six hundred thirty-seven".