42142726 has 4 divisors (see below), whose sum is σ = 63214092. Its totient is φ = 21071362.

The previous prime is 42142687. The next prime is 42142729. The reversal of 42142726 is 62724124.

It is a happy number.

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

It is a super-2 number, since 2×42142726² = 3552018709422152, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42142694 and 42142703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42142729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10535680 + ... + 10535683.

It is an arithmetic number, because the mean of its divisors is an integer number (15803523).

Almost surely, 2^42142726 is an apocalyptic number.

42142726 is a deficient number, since it is larger than the sum of its proper divisors (21071366).

42142726 is a wasteful number, since it uses less digits than its factorization.

42142726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21071365.

The product of its digits is 5376, while the sum is 28.

The square root of 42142726 is about 6491.7429092656. The cubic root of 42142726 is about 347.9959648539.

The spelling of 42142726 in words is "forty-two million, one hundred forty-two thousand, seven hundred twenty-six".