42105542 has 4 divisors (see below), whose sum is σ = 63158316. Its totient is φ = 21052770.

The previous prime is 42105523. The next prime is 42105563. The reversal of 42105542 is 24550124.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×42105542² = 3545753334227528, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10526384 + ... + 10526387.

It is an arithmetic number, because the mean of its divisors is an integer number (15789579).

Almost surely, 2^42105542 is an apocalyptic number.

42105542 is a deficient number, since it is larger than the sum of its proper divisors (21052774).

42105542 is a wasteful number, since it uses less digits than its factorization.

42105542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21052773.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 42105542 is about 6488.8783314222. The cubic root of 42105542 is about 347.8935850696.

Adding to 42105542 its reverse (24550124), we get a palindrome (66655666).

The spelling of 42105542 in words is "forty-two million, one hundred five thousand, five hundred forty-two".