42220642 has 16 divisors (see below), whose sum is σ = 64438272. Its totient is φ = 20744640.

The previous prime is 42220637. The next prime is 42220643. The reversal of 42220642 is 24602224.

It is a super-2 number, since 2×42220642² = 3565165221784328, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42220643) 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, 27967 + ... + 29437.

It is an arithmetic number, because the mean of its divisors is an integer number (4027392).

Almost surely, 2^42220642 is an apocalyptic number.

42220642 is a deficient number, since it is larger than the sum of its proper divisors (22217630).

42220642 is a wasteful number, since it uses less digits than its factorization.

42220642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1713.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 42220642 is about 6497.7412998672. The cubic root of 42220642 is about 348.2102980895.

Adding to 42220642 its reverse (24602224), we get a palindrome (66822866).

The spelling of 42220642 in words is "forty-two million, two hundred twenty thousand, six hundred forty-two".