42212425 has 6 divisors (see below), whose sum is σ = 52343438. Its totient is φ = 33769920.

The previous prime is 42212413. The next prime is 42212431. The reversal of 42212425 is 52421224.

It can be written as a sum of positive squares in 3 ways, for example, as 4426816 + 37785609 = 2104^2 + 6147^2 .

It is not a de Polignac number, because 42212425 - 2⁹ = 42211913 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42212396 and 42212405.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 844224 + ... + 844273.

Almost surely, 2^42212425 is an apocalyptic number.

It is an amenable number.

42212425 is a deficient number, since it is larger than the sum of its proper divisors (10131013).

42212425 is a wasteful number, since it uses less digits than its factorization.

42212425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1688507 (or 1688502 counting only the distinct ones).

The product of its digits is 1280, while the sum is 22.

The square root of 42212425 is about 6497.1089724584. The cubic root of 42212425 is about 348.1877070099.

Adding to 42212425 its reverse (52421224), we get a palindrome (94633649).

The spelling of 42212425 in words is "forty-two million, two hundred twelve thousand, four hundred twenty-five".