42912725 has 6 divisors (see below), whose sum is σ = 53211810. Its totient is φ = 34330160.

The previous prime is 42912719. The next prime is 42912769. The reversal of 42912725 is 52721924.

It can be written as a sum of positive squares in 3 ways, for example, as 167281 + 42745444 = 409^2 + 6538^2 .

It is not a de Polignac number, because 42912725 - 2¹⁸ = 42650581 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42912691 and 42912700.

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, 858230 + ... + 858279.

It is an arithmetic number, because the mean of its divisors is an integer number (8868635).

Almost surely, 2^42912725 is an apocalyptic number.

It is an amenable number.

42912725 is a deficient number, since it is larger than the sum of its proper divisors (10299085).

42912725 is a wasteful number, since it uses less digits than its factorization.

42912725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1716519 (or 1716514 counting only the distinct ones).

The product of its digits is 10080, while the sum is 32.

The square root of 42912725 is about 6550.7804878503. The cubic root of 42912725 is about 350.1026229684.

The spelling of 42912725 in words is "forty-two million, nine hundred twelve thousand, seven hundred twenty-five".