42420432 has 40 divisors (see below), whose sum is σ = 110161600. Its totient is φ = 14065920.

The previous prime is 42420419. The next prime is 42420439. The reversal of 42420432 is 23402424.

It is a junction number, because it is equal to n+sod(n) for n = 42420399 and 42420408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42420439) 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, 7332 + ... + 11772.

It is an arithmetic number, because the mean of its divisors is an integer number (2754040).

Almost surely, 2^42420432 is an apocalyptic number.

It is an amenable number.

42420432 is an abundant number, since it is smaller than the sum of its proper divisors (67741168).

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

42420432 is a wasteful number, since it uses less digits than its factorization.

42420432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4651 (or 4645 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 42420432 is about 6513.0969592046. The cubic root of 42420432 is about 348.7586829970.

Adding to 42420432 its reverse (23402424), we get a palindrome (65822856).

The spelling of 42420432 in words is "forty-two million, four hundred twenty thousand, four hundred thirty-two".