40870042 has 4 divisors (see below), whose sum is σ = 61305066. Its totient is φ = 20435020.

The previous prime is 40870033. The next prime is 40870051. The reversal of 40870042 is 24007804.

40870042 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 an interprime number because it is at equal distance from previous prime (40870033) and next prime (40870051).

It can be written as a sum of positive squares in only one way, i.e., 40717161 + 152881 = 6381^2 + 391^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40869989 and 40870016.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 10217509 + ... + 10217512.

Almost surely, 2^40870042 is an apocalyptic number.

40870042 is a deficient number, since it is larger than the sum of its proper divisors (20435024).

40870042 is a wasteful number, since it uses less digits than its factorization.

40870042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20435023.

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 40870042 is about 6392.9681682298. The cubic root of 40870042 is about 344.4570104407.

Adding to 40870042 its reverse (24007804), we get a palindrome (64877846).

The spelling of 40870042 in words is "forty million, eight hundred seventy thousand, forty-two".