42172742 has 12 divisors (see below), whose sum is σ = 66764916. Its totient is φ = 19976220.

The previous prime is 42172727. The next prime is 42172759. The reversal of 42172742 is 24727124.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28484 + ... + 29927.

It is an arithmetic number, because the mean of its divisors is an integer number (5563743).

Almost surely, 2^42172742 is an apocalyptic number.

42172742 is a deficient number, since it is larger than the sum of its proper divisors (24592174).

42172742 is a wasteful number, since it uses less digits than its factorization.

42172742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58451 (or 58432 counting only the distinct ones).

The product of its digits is 6272, while the sum is 29.

The square root of 42172742 is about 6494.0543576413. The cubic root of 42172742 is about 348.0785648575.

Adding to 42172742 its reverse (24727124), we get a palindrome (66899866).

It can be divided in two parts, 4 and 2172742, that multiplied together give a palindrome (8690968).

The spelling of 42172742 in words is "forty-two million, one hundred seventy-two thousand, seven hundred forty-two".