2256742 has 4 divisors (see below), whose sum is σ = 3385116. Its totient is φ = 1128370.

The previous prime is 2256739. The next prime is 2256743. The reversal of 2256742 is 2476522.

It is a semiprime because it is the product of two primes.

It is a d-powerful number, because it can be written as 2⁹ + 2¹⁵ + 5⁵ + 6⁸ + 7² + 4⁷ + 2¹⁹ .

It is a self number, because there is not a number n which added to its sum of digits gives 2256742.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2256743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564184 + ... + 564187.

It is an arithmetic number, because the mean of its divisors is an integer number (846279).

2^2256742 is an apocalyptic number.

2256742 is a deficient number, since it is larger than the sum of its proper divisors (1128374).

2256742 is a wasteful number, since it uses less digits than its factorization.

2256742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128373.

The product of its digits is 6720, while the sum is 28.

The square root of 2256742 is about 1502.2456523485. The cubic root of 2256742 is about 131.1678209675.

The spelling of 2256742 in words is "two million, two hundred fifty-six thousand, seven hundred forty-two".