42738525 has 18 divisors (see below), whose sum is σ = 76549850. Its totient is φ = 22793760.

The previous prime is 42738503. The next prime is 42738539. The reversal of 42738525 is 52583724.

It can be written as a sum of positive squares in 3 ways, for example, as 45369 + 42693156 = 213^2 + 6534^2 .

It is not a de Polignac number, because 42738525 - 2⁶ = 42738461 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42738525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 94750 + ... + 95199.

Almost surely, 2^42738525 is an apocalyptic number.

42738525 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42738525 is a deficient number, since it is larger than the sum of its proper divisors (33811325).

42738525 is a wasteful number, since it uses less digits than its factorization.

42738525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189965 (or 189957 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The square root of 42738525 is about 6537.4708412352. The cubic root of 42738525 is about 349.6282447328.

The spelling of 42738525 in words is "forty-two million, seven hundred thirty-eight thousand, five hundred twenty-five".