42224025 has 12 divisors (see below), whose sum is σ = 69810512. Its totient is φ = 22519440.

The previous prime is 42223997. The next prime is 42224033. The reversal of 42224025 is 52042224.

It is not a de Polignac number, because 42224025 - 2⁷ = 42223897 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 42223992 and 42224010.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 281419 + ... + 281568.

Almost surely, 2^42224025 is an apocalyptic number.

It is an amenable number.

42224025 is a deficient number, since it is larger than the sum of its proper divisors (27586487).

42224025 is a wasteful number, since it uses less digits than its factorization.

42224025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563000 (or 562995 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 42224025 is about 6498.0016158816. The cubic root of 42224025 is about 348.2195981532.

Subtracting from 42224025 its sum of digits (21), we obtain a square (42224004 = 6498²).

Adding to 42224025 its reverse (52042224), we get a palindrome (94266249).

The spelling of 42224025 in words is "forty-two million, two hundred twenty-four thousand, twenty-five".