42075725 has 6 divisors (see below), whose sum is σ = 52173930. Its totient is φ = 33660560.

The previous prime is 42075713. The next prime is 42075743. The reversal of 42075725 is 52757024.

It can be written as a sum of positive squares in 3 ways, for example, as 7946761 + 34128964 = 2819^2 + 5842^2 .

It is a de Polignac number, because none of the positive numbers 2^k-42075725 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 42075691 and 42075700.

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, 841490 + ... + 841539.

It is an arithmetic number, because the mean of its divisors is an integer number (8695655).

Almost surely, 2^42075725 is an apocalyptic number.

It is an amenable number.

42075725 is a deficient number, since it is larger than the sum of its proper divisors (10098205).

42075725 is a wasteful number, since it uses less digits than its factorization.

42075725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1683039 (or 1683034 counting only the distinct ones).

The product of its (nonzero) digits is 19600, while the sum is 32.

The square root of 42075725 is about 6486.5803779804. The cubic root of 42075725 is about 347.8114455057.

The spelling of 42075725 in words is "forty-two million, seventy-five thousand, seven hundred twenty-five".