42405125 has 16 divisors (see below), whose sum is σ = 60483072. Its totient is φ = 29077200.

The previous prime is 42405113. The next prime is 42405127. The reversal of 42405125 is 52150424.

It is a happy number.

It is not a de Polignac number, because 42405125 - 2¹⁴ = 42388741 is a prime.

It is a super-3 number, since 3×42405125³ (a number of 24 digits) contains 333 as substring.

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 42405125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42405127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23357 + ... + 25106.

It is an arithmetic number, because the mean of its divisors is an integer number (3780192).

Almost surely, 2^42405125 is an apocalyptic number.

It is an amenable number.

42405125 is a deficient number, since it is larger than the sum of its proper divisors (18077947).

42405125 is an equidigital number, since it uses as much as digits as its factorization.

42405125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48485 (or 48475 counting only the distinct ones).

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

The square root of 42405125 is about 6511.9217593580. The cubic root of 42405125 is about 348.7167292250.

Adding to 42405125 its reverse (52150424), we get a palindrome (94555549).

The spelling of 42405125 in words is "forty-two million, four hundred five thousand, one hundred twenty-five".