42281247 has 16 divisors (see below), whose sum is σ = 57871872. Its totient is φ = 27445440.

The previous prime is 42281243. The next prime is 42281257. The reversal of 42281247 is 74218224.

It is not a de Polignac number, because 42281247 - 2² = 42281243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42281243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31347 + ... + 32667.

It is an arithmetic number, because the mean of its divisors is an integer number (3616992).

Almost surely, 2^42281247 is an apocalyptic number.

42281247 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

42281247 is a deficient number, since it is larger than the sum of its proper divisors (15590625).

42281247 is a wasteful number, since it uses less digits than its factorization.

42281247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1598.

The product of its digits is 7168, while the sum is 30.

The square root of 42281247 is about 6502.4031711360. The cubic root of 42281247 is about 348.3768295513.

The spelling of 42281247 in words is "forty-two million, two hundred eighty-one thousand, two hundred forty-seven".