42206434 has 4 divisors (see below), whose sum is σ = 63309654. Its totient is φ = 21103216.

The previous prime is 42206419. The next prime is 42206441. The reversal of 42206434 is 43460224.

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

It can be written as a sum of positive squares in only one way, i.e., 35462025 + 6744409 = 5955^2 + 2597^2 .

It is a junction number, because it is equal to n+sod(n) for n = 42206399 and 42206408.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10551607 + ... + 10551610.

Almost surely, 2^42206434 is an apocalyptic number.

42206434 is a deficient number, since it is larger than the sum of its proper divisors (21103220).

42206434 is a wasteful number, since it uses less digits than its factorization.

42206434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21103219.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 42206434 is about 6496.6479048814. The cubic root of 42206434 is about 348.1712340461.

Adding to 42206434 its reverse (43460224), we get a palindrome (85666658).

The spelling of 42206434 in words is "forty-two million, two hundred six thousand, four hundred thirty-four".