42406634 has 4 divisors (see below), whose sum is σ = 63609954. Its totient is φ = 21203316.

The previous prime is 42406627. The next prime is 42406657. The reversal of 42406634 is 43660424.

It is a happy number.

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., 29106025 + 13300609 = 5395^2 + 3647^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 42406597 and 42406606.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601657 + ... + 10601660.

Almost surely, 2^42406634 is an apocalyptic number.

42406634 is a deficient number, since it is larger than the sum of its proper divisors (21203320).

42406634 is a wasteful number, since it uses less digits than its factorization.

42406634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21203319.

The product of its (nonzero) digits is 13824, while the sum is 29.

The square root of 42406634 is about 6512.0376227414. The cubic root of 42406634 is about 348.7208655749.

The spelling of 42406634 in words is "forty-two million, four hundred six thousand, six hundred thirty-four".