42540004 has 18 divisors (see below), whose sum is σ = 80613330. Its totient is φ = 19633536.

The previous prime is 42539989. The next prime is 42540019. The reversal of 42540004 is 40004524.

It is an interprime number because it is at equal distance from previous prime (42539989) and next prime (42540019).

It can be written as a sum of positive squares in 3 ways, for example, as 419904 + 42120100 = 648^2 + 6490^2 .

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, 30789 + ... + 32140.

Almost surely, 2^42540004 is an apocalyptic number.

It is an amenable number.

42540004 is a deficient number, since it is larger than the sum of its proper divisors (38073326).

42540004 is a wasteful number, since it uses less digits than its factorization.

42540004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62959 (or 62944 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 42540004 is about 6522.2698502899. The cubic root of 42540004 is about 349.0860618129.

Adding to 42540004 its reverse (40004524), we get a palindrome (82544528).

The spelling of 42540004 in words is "forty-two million, five hundred forty thousand, four".