42442725 has 48 divisors (see below), whose sum is σ = 76495104. Its totient is φ = 20640000.

The previous prime is 42442723. The next prime is 42442733. The reversal of 42442725 is 52724424.

It is not a de Polignac number, because 42442725 - 2¹ = 42442723 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42442692 and 42442701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42442723) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 98260 + ... + 98690.

It is an arithmetic number, because the mean of its divisors is an integer number (1593648).

Almost surely, 2^42442725 is an apocalyptic number.

It is an amenable number.

42442725 is a deficient number, since it is larger than the sum of its proper divisors (34052379).

42442725 is a wasteful number, since it uses less digits than its factorization.

42442725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558 (or 553 counting only the distinct ones).

The product of its digits is 17920, while the sum is 30.

The square root of 42442725 is about 6514.8081322476. The cubic root of 42442725 is about 348.8197661071.

The spelling of 42442725 in words is "forty-two million, four hundred forty-two thousand, seven hundred twenty-five".