42704031 has 32 divisors (see below), whose sum is σ = 62599680. Its totient is φ = 25812864.

The previous prime is 42704029. The next prime is 42704041. The reversal of 42704031 is 13040724.

It is not a de Polignac number, because 42704031 - 2¹ = 42704029 is a prime.

It is a super-2 number, since 2×42704031² = 3647268527297922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42703989 and 42704007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42704041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 109585 + ... + 109973.

It is an arithmetic number, because the mean of its divisors is an integer number (1956240).

Almost surely, 2^42704031 is an apocalyptic number.

42704031 is a deficient number, since it is larger than the sum of its proper divisors (19895649).

42704031 is a wasteful number, since it uses less digits than its factorization.

42704031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 42704031 is about 6534.8321325035. The cubic root of 42704031 is about 349.5341584826.

Adding to 42704031 its reverse (13040724), we get a palindrome (55744755).

The spelling of 42704031 in words is "forty-two million, seven hundred four thousand, thirty-one".