42455925 has 18 divisors (see below), whose sum is σ = 76043682. Its totient is φ = 22643040.

The previous prime is 42455923. The next prime is 42455927. The reversal of 42455925 is 52955424.

It is an interprime number because it is at equal distance from previous prime (42455923) and next prime (42455927).

It can be written as a sum of positive squares in 3 ways, for example, as 6563844 + 35892081 = 2562^2 + 5991^2 .

It is not a de Polignac number, because 42455925 - 2¹ = 42455923 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42455925.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42455923) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 94122 + ... + 94571.

It is an arithmetic number, because the mean of its divisors is an integer number (4224649).

Almost surely, 2^42455925 is an apocalyptic number.

42455925 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42455925 is a deficient number, since it is larger than the sum of its proper divisors (33587757).

42455925 is a wasteful number, since it uses less digits than its factorization.

42455925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188709 (or 188701 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The square root of 42455925 is about 6515.8211301416. The cubic root of 42455925 is about 348.8559241975.

The spelling of 42455925 in words is "forty-two million, four hundred fifty-five thousand, nine hundred twenty-five".