42722399 has 8 divisors (see below), whose sum is σ = 43647552. Its totient is φ = 41801760.

The previous prime is 42722357. The next prime is 42722417. The reversal of 42722399 is 99322724.

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 42722399 - 2¹² = 42718303 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 (42722299) 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, 23669 + ... + 25409.

It is an arithmetic number, because the mean of its divisors is an integer number (5455944).

Almost surely, 2^42722399 is an apocalyptic number.

42722399 is a deficient number, since it is larger than the sum of its proper divisors (925153).

42722399 is a wasteful number, since it uses less digits than its factorization.

42722399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2257.

The product of its digits is 54432, while the sum is 38.

The square root of 42722399 is about 6536.2373732905. The cubic root of 42722399 is about 349.5842655646.

The spelling of 42722399 in words is "forty-two million, seven hundred twenty-two thousand, three hundred ninety-nine".