422140525 has 6 divisors (see below), whose sum is σ = 523454282. Its totient is φ = 337712400.

The previous prime is 422140493. The next prime is 422140553. The reversal of 422140525 is 525041224.

It can be written as a sum of positive squares in 3 ways, for example, as 133888041 + 288252484 = 11571^2 + 16978^2 .

It is not a de Polignac number, because 422140525 - 2⁵ = 422140493 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: 16885621 = 422140525 / (4 + 2 + 2 + 1 + 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 422140525.

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, 8442786 + ... + 8442835.

Almost surely, 2^422140525 is an apocalyptic number.

It is an amenable number.

422140525 is a deficient number, since it is larger than the sum of its proper divisors (101313757).

422140525 is a wasteful number, since it uses less digits than its factorization.

422140525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16885631 (or 16885626 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 422140525 is about 20546.0586244662. The cubic root of 422140525 is about 750.1573151484.

Adding to 422140525 its reverse (525041224), we get a palindrome (947181749).

The spelling of 422140525 in words is "four hundred twenty-two million, one hundred forty thousand, five hundred twenty-five".