421442142 has 16 divisors (see below), whose sum is σ = 919510272. Its totient is φ = 127709720.

The previous prime is 421442137. The next prime is 421442149. The reversal of 421442142 is 241244124.

It is a super-2 number, since 2×421442142² = 355226958107096328, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421442149) 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, 3192678 + ... + 3192809.

It is an arithmetic number, because the mean of its divisors is an integer number (57469392).

Almost surely, 2^421442142 is an apocalyptic number.

421442142 is an abundant number, since it is smaller than the sum of its proper divisors (498068130).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421442142 is a wasteful number, since it uses less digits than its factorization.

421442142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6385503.

The product of its digits is 2048, while the sum is 24.

The square root of 421442142 is about 20529.0560425948. The cubic root of 421442142 is about 749.7434037767.

Adding to 421442142 its reverse (241244124), we get a palindrome (662686266).

The spelling of 421442142 in words is "four hundred twenty-one million, four hundred forty-two thousand, one hundred forty-two".