42123625 has 8 divisors (see below), whose sum is σ = 52570440. Its totient is φ = 33698800.

The previous prime is 42123623. The next prime is 42123629. The reversal of 42123625 is 52632124.

It can be written as a sum of positive squares in 4 ways, for example, as 2143296 + 39980329 = 1464^2 + 6323^2 .

It is not a de Polignac number, because 42123625 - 2¹ = 42123623 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 42123625.

It is not an unprimeable number, because it can be changed into a prime (42123623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168370 + ... + 168619.

It is an arithmetic number, because the mean of its divisors is an integer number (6571305).

Almost surely, 2^42123625 is an apocalyptic number.

It is an amenable number.

42123625 is a deficient number, since it is larger than the sum of its proper divisors (10446815).

42123625 is an equidigital number, since it uses as much as digits as its factorization.

42123625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337004 (or 336994 counting only the distinct ones).

The product of its digits is 2880, while the sum is 25.

The square root of 42123625 is about 6490.2715659670. The cubic root of 42123625 is about 347.9433810428.

Adding to 42123625 its reverse (52632124), we get a palindrome (94755749).

The spelling of 42123625 in words is "forty-two million, one hundred twenty-three thousand, six hundred twenty-five".