42212420 has 12 divisors (see below), whose sum is σ = 88646124. Its totient is φ = 16884960.

The previous prime is 42212413. The next prime is 42212431. The reversal of 42212420 is 2421224.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5827396 + 36385024 = 2414^2 + 6032^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1055291 + ... + 1055330.

It is an arithmetic number, because the mean of its divisors is an integer number (7387177).

Almost surely, 2^42212420 is an apocalyptic number.

It is an amenable number.

42212420 is an abundant number, since it is smaller than the sum of its proper divisors (46433704).

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

42212420 is a wasteful number, since it uses less digits than its factorization.

42212420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2110630 (or 2110628 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 42212420 is about 6497.1085876719. The cubic root of 42212420 is about 348.1876932624.

Adding to 42212420 its reverse (2421224), we get a palindrome (44633644).

The spelling of 42212420 in words is "forty-two million, two hundred twelve thousand, four hundred twenty".