42722427 has 16 divisors (see below), whose sum is σ = 62358912. Its totient is φ = 25801920.

The previous prime is 42722417. The next prime is 42722429. The reversal of 42722427 is 72422724.

It is not a de Polignac number, because 42722427 - 2⁷ = 42722299 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42722394 and 42722403.

It is not an unprimeable number, because it can be changed into a prime (42722429) 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, 8023 + ... + 12239.

It is an arithmetic number, because the mean of its divisors is an integer number (3897432).

Almost surely, 2^42722427 is an apocalyptic number.

42722427 is a deficient number, since it is larger than the sum of its proper divisors (19636485).

42722427 is a wasteful number, since it uses less digits than its factorization.

42722427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4538.

The product of its digits is 12544, while the sum is 30.

The square root of 42722427 is about 6536.2395151953. The cubic root of 42722427 is about 349.5843419363.

The spelling of 42722427 in words is "forty-two million, seven hundred twenty-two thousand, four hundred twenty-seven".