42256247 has 8 divisors (see below), whose sum is σ = 48524160. Its totient is φ = 36392760.

The previous prime is 42256241. The next prime is 42256259. The reversal of 42256247 is 74265224.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42256247 - 2¹⁰ = 42255223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42256241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100883 + ... + 101300.

It is an arithmetic number, because the mean of its divisors is an integer number (6065520).

Almost surely, 2^42256247 is an apocalyptic number.

42256247 is a deficient number, since it is larger than the sum of its proper divisors (6267913).

42256247 is a wasteful number, since it uses less digits than its factorization.

42256247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202213.

The product of its digits is 26880, while the sum is 32.

The square root of 42256247 is about 6500.4805207000. The cubic root of 42256247 is about 348.3081534164.

The spelling of 42256247 in words is "forty-two million, two hundred fifty-six thousand, two hundred forty-seven".