42042254 has 4 divisors (see below), whose sum is σ = 63063384. Its totient is φ = 21021126.

The previous prime is 42042227. The next prime is 42042263. The reversal of 42042254 is 45224024.

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

It is a super-2 number, since 2×42042254² = 3535102242801032, 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, 10510562 + ... + 10510565.

It is an arithmetic number, because the mean of its divisors is an integer number (15765846).

Almost surely, 2^42042254 is an apocalyptic number.

42042254 is a deficient number, since it is larger than the sum of its proper divisors (21021130).

42042254 is a wasteful number, since it uses less digits than its factorization.

42042254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21021129.

The product of its (nonzero) digits is 2560, while the sum is 23.

The square root of 42042254 is about 6483.9998457742. Note that the first 3 decimals coincide. The cubic root of 42042254 is about 347.7191936971.

Adding to 42042254 its reverse (45224024), we get a palindrome (87266278).

The spelling of 42042254 in words is "forty-two million, forty-two thousand, two hundred fifty-four".