42220427 has 4 divisors (see below), whose sum is σ = 42356496. Its totient is φ = 42084360.

The previous prime is 42220393. The next prime is 42220463. The reversal of 42220427 is 72402224.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42220427 - 2¹⁰ = 42219403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42220127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67568 + ... + 68189.

It is an arithmetic number, because the mean of its divisors is an integer number (10589124).

Almost surely, 2^42220427 is an apocalyptic number.

42220427 is a deficient number, since it is larger than the sum of its proper divisors (136069).

42220427 is a wasteful number, since it uses less digits than its factorization.

42220427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136068.

The product of its (nonzero) digits is 1792, while the sum is 23.

The square root of 42220427 is about 6497.7247556356. The cubic root of 42220427 is about 348.2097070252.

The spelling of 42220427 in words is "forty-two million, two hundred twenty thousand, four hundred twenty-seven".