42421542 has 16 divisors (see below), whose sum is σ = 86648832. Its totient is φ = 13839560.

The previous prime is 42421493. The next prime is 42421553. The reversal of 42421542 is 24512424.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74934 + ... + 75497.

It is an arithmetic number, because the mean of its divisors is an integer number (5415552).

Almost surely, 2^42421542 is an apocalyptic number.

42421542 is an abundant number, since it is smaller than the sum of its proper divisors (44227290).

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

42421542 is a wasteful number, since it uses less digits than its factorization.

42421542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150483.

The product of its digits is 2560, while the sum is 24.

The square root of 42421542 is about 6513.1821715656. The cubic root of 42421542 is about 348.7617249177.

Adding to 42421542 its reverse (24512424), we get a palindrome (66933966).

The spelling of 42421542 in words is "forty-two million, four hundred twenty-one thousand, five hundred forty-two".