42212906 has 4 divisors (see below), whose sum is σ = 63319362. Its totient is φ = 21106452.

The previous prime is 42212879. The next prime is 42212941. The reversal of 42212906 is 60921224.

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., 32547025 + 9665881 = 5705^2 + 3109^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10553225 + ... + 10553228.

Almost surely, 2^42212906 is an apocalyptic number.

42212906 is a deficient number, since it is larger than the sum of its proper divisors (21106456).

42212906 is a wasteful number, since it uses less digits than its factorization.

42212906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21106455.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 42212906 is about 6497.1459888169. The cubic root of 42212906 is about 348.1890295087.

The spelling of 42212906 in words is "forty-two million, two hundred twelve thousand, nine hundred six".