42213925 has 24 divisors (see below), whose sum is σ = 56748104. Its totient is φ = 30965760.

The previous prime is 42213923. The next prime is 42213931. The reversal of 42213925 is 52931224.

It can be written as a sum of positive squares in 12 ways, for example, as 28068804 + 14145121 = 5298^2 + 3761^2 .

It is not a de Polignac number, because 42213925 - 2¹ = 42213923 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42213893 and 42213902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42213923) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62389 + ... + 63061.

Almost surely, 2^42213925 is an apocalyptic number.

It is an amenable number.

42213925 is a deficient number, since it is larger than the sum of its proper divisors (14534179).

42213925 is a wasteful number, since it uses less digits than its factorization.

42213925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889 (or 884 counting only the distinct ones).

The product of its digits is 4320, while the sum is 28.

The square root of 42213925 is about 6497.2244073912. The cubic root of 42213925 is about 348.1918311935.

The spelling of 42213925 in words is "forty-two million, two hundred thirteen thousand, nine hundred twenty-five".