42840625 has 12 divisors (see below), whose sum is σ = 53551260. Its totient is φ = 34270000.

The previous prime is 42840593. The next prime is 42840643. The reversal of 42840625 is 52604824.

It can be written as a sum of positive squares in 6 ways, for example, as 27793984 + 15046641 = 5272^2 + 3879^2 .

It is not a de Polignac number, because 42840625 - 2⁵ = 42840593 is a prime.

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, 3730 + ... + 9979.

It is an arithmetic number, because the mean of its divisors is an integer number (4462605).

Almost surely, 2^42840625 is an apocalyptic number.

It is an amenable number.

42840625 is a deficient number, since it is larger than the sum of its proper divisors (10710635).

42840625 is an frugal number, since it uses more digits than its factorization.

42840625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13734 (or 13714 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 42840625 is about 6545.2750133207. The cubic root of 42840625 is about 349.9064375760.

The spelling of 42840625 in words is "forty-two million, eight hundred forty thousand, six hundred twenty-five".