42070631 has 4 divisors (see below), whose sum is σ = 44545392. Its totient is φ = 39595872.

The previous prime is 42070607. The next prime is 42070661. The reversal of 42070631 is 13607024.

42070631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 42070631 - 2¹⁰ = 42069607 is a prime.

It is a super-2 number, since 2×42070631² = 3539875985476322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42070597 and 42070606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42070661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1237355 + ... + 1237388.

It is an arithmetic number, because the mean of its divisors is an integer number (11136348).

Almost surely, 2^42070631 is an apocalyptic number.

42070631 is a deficient number, since it is larger than the sum of its proper divisors (2474761).

42070631 is a wasteful number, since it uses less digits than its factorization.

42070631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2474760.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 42070631 is about 6486.1877092788. The cubic root of 42070631 is about 347.7974087264.

Adding to 42070631 its reverse (13607024), we get a palindrome (55677655).

The spelling of 42070631 in words is "forty-two million, seventy thousand, six hundred thirty-one".