42890725 has 12 divisors (see below), whose sum is σ = 53316900. Its totient is φ = 34227200.

The previous prime is 42890647. The next prime is 42890767. The reversal of 42890725 is 52709824.

It can be written as a sum of positive squares in 6 ways, for example, as 887364 + 42003361 = 942^2 + 6481^2 .

It is not a de Polignac number, because 42890725 - 2⁹ = 42890213 is a prime.

It is a super-2 number, since 2×42890725² = 3679228582051250, which contains 22 as substring.

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, 9315 + ... + 13135.

It is an arithmetic number, because the mean of its divisors is an integer number (4443075).

Almost surely, 2^42890725 is an apocalyptic number.

It is an amenable number.

42890725 is a deficient number, since it is larger than the sum of its proper divisors (10426175).

42890725 is a wasteful number, since it uses less digits than its factorization.

42890725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4280 (or 4275 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 42890725 is about 6549.1010833549. The cubic root of 42890725 is about 350.0427838855.

The spelling of 42890725 in words is "forty-two million, eight hundred ninety thousand, seven hundred twenty-five".