42016724 has 24 divisors (see below), whose sum is σ = 78177960. Its totient is φ = 19690496.

The previous prime is 42016721. The next prime is 42016747. The reversal of 42016724 is 42761024.

42016724 = T₄₁₉ + T₄₂₀ + ... + T₆₈₇.

It can be written as a sum of positive squares in 4 ways, for example, as 2829124 + 39187600 = 1682^2 + 6260^2 .

It is a junction number, because it is equal to n+sod(n) for n = 42016693 and 42016702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42016721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17144 + ... + 19440.

It is an arithmetic number, because the mean of its divisors is an integer number (3257415).

Almost surely, 2^42016724 is an apocalyptic number.

It is an amenable number.

42016724 is a deficient number, since it is larger than the sum of its proper divisors (36161236).

42016724 is a wasteful number, since it uses less digits than its factorization.

42016724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2587 (or 2585 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 42016724 is about 6482.0308546010. The cubic root of 42016724 is about 347.6487957230.

Adding to 42016724 its reverse (42761024), we get a palindrome (84777748).

The spelling of 42016724 in words is "forty-two million, sixteen thousand, seven hundred twenty-four".