42212525 has 12 divisors (see below), whose sum is σ = 52428192. Its totient is φ = 33715440.

The previous prime is 42212501. The next prime is 42212531. The reversal of 42212525 is 52521224.

It is not a de Polignac number, because 42212525 - 2¹⁶ = 42146989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42212525.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22784 + ... + 24566.

It is an arithmetic number, because the mean of its divisors is an integer number (4369016).

Almost surely, 2^42212525 is an apocalyptic number.

It is an amenable number.

42212525 is a deficient number, since it is larger than the sum of its proper divisors (10215667).

42212525 is a wasteful number, since it uses less digits than its factorization.

42212525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2740 (or 2735 counting only the distinct ones).

The product of its digits is 1600, while the sum is 23.

The square root of 42212525 is about 6497.1166681844. The cubic root of 42212525 is about 348.1879819585.

Adding to 42212525 its reverse (52521224), we get a palindrome (94733749).

The spelling of 42212525 in words is "forty-two million, two hundred twelve thousand, five hundred twenty-five".