42068402 has 4 divisors (see below), whose sum is σ = 63102606. Its totient is φ = 21034200.

The previous prime is 42068399. The next prime is 42068407. The reversal of 42068402 is 20486024.

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., 35509681 + 6558721 = 5959^2 + 2561^2 .

It is not an unprimeable number, because it can be changed into a prime (42068407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10517099 + ... + 10517102.

Almost surely, 2^42068402 is an apocalyptic number.

42068402 is a deficient number, since it is larger than the sum of its proper divisors (21034204).

42068402 is a wasteful number, since it uses less digits than its factorization.

42068402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21034203.

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 42068402 is about 6486.0158803383. The cubic root of 42068402 is about 347.7912662457.

The spelling of 42068402 in words is "forty-two million, sixty-eight thousand, four hundred two".