42422247 has 24 divisors (see below), whose sum is σ = 71525376. Its totient is φ = 23723856.

The previous prime is 42422243. The next prime is 42422257. The reversal of 42422247 is 74222424.

It is not a de Polignac number, because 42422247 - 2² = 42422243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42422247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42422243) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4203 + ... + 10124.

It is an arithmetic number, because the mean of its divisors is an integer number (2980224).

Almost surely, 2^42422247 is an apocalyptic number.

42422247 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

42422247 is a deficient number, since it is larger than the sum of its proper divisors (29103129).

42422247 is a wasteful number, since it uses less digits than its factorization.

42422247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14387 (or 14384 counting only the distinct ones).

The product of its digits is 7168, while the sum is 27.

The square root of 42422247 is about 6513.2362923511. The cubic root of 42422247 is about 348.7636569208.

The spelling of 42422247 in words is "forty-two million, four hundred twenty-two thousand, two hundred forty-seven".