42540430 has 32 divisors (see below), whose sum is σ = 81113760. Its totient is φ = 16018560.

The previous prime is 42540413. The next prime is 42540437. The reversal of 42540430 is 3404524.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42540437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33772 + ... + 35008.

It is an arithmetic number, because the mean of its divisors is an integer number (2534805).

Almost surely, 2^42540430 is an apocalyptic number.

42540430 is a deficient number, since it is larger than the sum of its proper divisors (38573330).

42540430 is a wasteful number, since it uses less digits than its factorization.

42540430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1444.

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 42540430 is about 6522.3025075505. The cubic root of 42540430 is about 349.0872270703.

Adding to 42540430 its reverse (3404524), we get a palindrome (45944954).

The spelling of 42540430 in words is "forty-two million, five hundred forty thousand, four hundred thirty".