42356866 has 4 divisors (see below), whose sum is σ = 63535302. Its totient is φ = 21178432.

The previous prime is 42356861. The next prime is 42356887. The reversal of 42356866 is 66865324.

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., 41873841 + 483025 = 6471^2 + 695^2 .

It is not an unprimeable number, because it can be changed into a prime (42356861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10589215 + ... + 10589218.

Almost surely, 2^42356866 is an apocalyptic number.

42356866 is a deficient number, since it is larger than the sum of its proper divisors (21178436).

42356866 is a wasteful number, since it uses less digits than its factorization.

42356866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21178435.

The product of its digits is 207360, while the sum is 40.

The square root of 42356866 is about 6508.2152699492. The cubic root of 42356866 is about 348.5843937378.

The spelling of 42356866 in words is "forty-two million, three hundred fifty-six thousand, eight hundred sixty-six".