42406534 has 16 divisors (see below), whose sum is σ = 67872816. Its totient is φ = 19801600.

The previous prime is 42406531. The next prime is 42406541. The reversal of 42406534 is 43560424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42406531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 307 + ... + 9214.

It is an arithmetic number, because the mean of its divisors is an integer number (4242051).

Almost surely, 2^42406534 is an apocalyptic number.

42406534 is a deficient number, since it is larger than the sum of its proper divisors (25466282).

42406534 is a wasteful number, since it uses less digits than its factorization.

42406534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9671.

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 42406534 is about 6512.0299446486. The cubic root of 42406534 is about 348.7205914660.

Adding to 42406534 its reverse (43560424), we get a palindrome (85966958).

The spelling of 42406534 in words is "forty-two million, four hundred six thousand, five hundred thirty-four".