42722137 has 8 divisors (see below), whose sum is σ = 43164800. Its totient is φ = 42282000.

The previous prime is 42722131. The next prime is 42722149. The reversal of 42722137 is 73122724.

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 42722137 - 2¹⁵ = 42689369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42722131) 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, 56512 + ... + 57262.

It is an arithmetic number, because the mean of its divisors is an integer number (5395600).

Almost surely, 2^42722137 is an apocalyptic number.

It is an amenable number.

42722137 is a deficient number, since it is larger than the sum of its proper divisors (442663).

42722137 is a wasteful number, since it uses less digits than its factorization.

42722137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1263.

The product of its digits is 4704, while the sum is 28.

The square root of 42722137 is about 6536.2173311480. The cubic root of 42722137 is about 349.5835509413.

The spelling of 42722137 in words is "forty-two million, seven hundred twenty-two thousand, one hundred thirty-seven".