42006946 has 4 divisors (see below), whose sum is σ = 63010422. Its totient is φ = 21003472.

The previous prime is 42006911. The next prime is 42006973. The reversal of 42006946 is 64960024.

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., 30858025 + 11148921 = 5555^2 + 3339^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501735 + ... + 10501738.

Almost surely, 2^42006946 is an apocalyptic number.

42006946 is a deficient number, since it is larger than the sum of its proper divisors (21003476).

42006946 is a wasteful number, since it uses less digits than its factorization.

42006946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21003475.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 42006946 is about 6481.2765717874. The cubic root of 42006946 is about 347.6218257190.

The spelling of 42006946 in words is "forty-two million, six thousand, nine hundred forty-six".