42621325 has 12 divisors (see below), whose sum is σ = 52982100. Its totient is φ = 34012160.

The previous prime is 42621317. The next prime is 42621331. The reversal of 42621325 is 52312624.

It can be written as a sum of positive squares in 6 ways, for example, as 7123561 + 35497764 = 2669^2 + 5958^2 .

It is not a de Polignac number, because 42621325 - 2³ = 42621317 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 42621325.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9327 + ... + 13123.

It is an arithmetic number, because the mean of its divisors is an integer number (4415175).

Almost surely, 2^42621325 is an apocalyptic number.

It is an amenable number.

42621325 is a deficient number, since it is larger than the sum of its proper divisors (10360775).

42621325 is a wasteful number, since it uses less digits than its factorization.

42621325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4256 (or 4251 counting only the distinct ones).

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

The square root of 42621325 is about 6528.5009764876. The cubic root of 42621325 is about 349.3083620398.

Adding to 42621325 its reverse (52312624), we get a palindrome (94933949).

The spelling of 42621325 in words is "forty-two million, six hundred twenty-one thousand, three hundred twenty-five".