42340525 has 6 divisors (see below), whose sum is σ = 52502282. Its totient is φ = 33872400.

The previous prime is 42340477. The next prime is 42340537. The reversal of 42340525 is 52504324.

It can be written as a sum of positive squares in 3 ways, for example, as 181476 + 42159049 = 426^2 + 6493^2 .

It is not a de Polignac number, because 42340525 - 2¹⁵ = 42307757 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 1693621 = 42340525 / (4 + 2 + 3 + 4 + 0 + 5 + 2 + 5).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42340525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 846786 + ... + 846835.

Almost surely, 2^42340525 is an apocalyptic number.

It is an amenable number.

42340525 is a deficient number, since it is larger than the sum of its proper divisors (10161757).

42340525 is a wasteful number, since it uses less digits than its factorization.

42340525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1693631 (or 1693626 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 42340525 is about 6506.9597355447. The cubic root of 42340525 is about 348.5395607840.

Adding to 42340525 its reverse (52504324), we get a palindrome (94844849).

The spelling of 42340525 in words is "forty-two million, three hundred forty thousand, five hundred twenty-five".