421433442 has 28 divisors (see below), whose sum is σ = 947794950. Its totient is φ = 140477328.

The previous prime is 421433377. The next prime is 421433447. The reversal of 421433442 is 244334124.

It is a happy number.

421433442 is a `hidden beast` number, since 4 + 214 + 3 + 3 + 442 = 666.

It can be written as a sum of positive squares in only one way, i.e., 374770881 + 46662561 = 19359^2 + 6831^2 .

It is a super-2 number, since 2×421433442² = 355212292071934728, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (421433447) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 143067 + ... + 145982.

Almost surely, 2^421433442 is an apocalyptic number.

421433442 is an abundant number, since it is smaller than the sum of its proper divisors (526361508).

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

421433442 is an equidigital number, since it uses as much as digits as its factorization.

421433442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289069 (or 289054 counting only the distinct ones).

The product of its digits is 9216, while the sum is 27.

The square root of 421433442 is about 20528.8441467122. The cubic root of 421433442 is about 749.7382446561.

Adding to 421433442 its reverse (244334124), we get a palindrome (665767566).

It can be divided in two parts, 421433 and 442, that added together give a cube (421875 = 75³).

The spelling of 421433442 in words is "four hundred twenty-one million, four hundred thirty-three thousand, four hundred forty-two".