42742530 has 24 divisors (see below), whose sum is σ = 111130812. Its totient is φ = 11397984.

The previous prime is 42742523. The next prime is 42742577. The reversal of 42742530 is 3524724.

It can be written as a sum of positive squares in 2 ways, for example, as 38975049 + 3767481 = 6243^2 + 1941^2 .

It is a junction number, because it is equal to n+sod(n) for n = 42742494 and 42742503.

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, 237369 + ... + 237548.

Almost surely, 2^42742530 is an apocalyptic number.

42742530 is an abundant number, since it is smaller than the sum of its proper divisors (68388282).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42742530 is a wasteful number, since it uses less digits than its factorization.

42742530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474930 (or 474927 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 27.

The square root of 42742530 is about 6537.7771451771. Note that the first 3 decimals coincide. The cubic root of 42742530 is about 349.6391655385.

The spelling of 42742530 in words is "forty-two million, seven hundred forty-two thousand, five hundred thirty".