2256457 has 4 divisors (see below), whose sum is σ = 2578816. Its totient is φ = 1934100.

The previous prime is 2256437. The next prime is 2256467. The reversal of 2256457 is 7546522.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2256457 - 2¹¹ = 2254409 is a prime.

It is a d-powerful number, because it can be written as 2¹³ + 2¹⁵ + 5 + 6³ + 4⁹ + 5⁹ + 7 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2256437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161169 + ... + 161182.

It is an arithmetic number, because the mean of its divisors is an integer number (644704).

2^2256457 is an apocalyptic number.

It is an amenable number.

2256457 is a deficient number, since it is larger than the sum of its proper divisors (322359).

2256457 is an equidigital number, since it uses as much as digits as its factorization.

2256457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322358.

The product of its digits is 16800, while the sum is 31.

The square root of 2256457 is about 1502.1507913655. The cubic root of 2256457 is about 131.1622990835.

The spelling of 2256457 in words is "two million, two hundred fifty-six thousand, four hundred fifty-seven".