42043030402 has 4 divisors (see below), whose sum is σ = 63064545606. Its totient is φ = 21021515200.

The previous prime is 42043030369. The next prime is 42043030409. The reversal of 42043030402 is 20403034024.

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., 26295541281 + 15747489121 = 162159^2 + 125489^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (42043030409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510757599 + ... + 10510757602.

Almost surely, 2^42043030402 is an apocalyptic number.

42043030402 is a deficient number, since it is larger than the sum of its proper divisors (21021515204).

42043030402 is a wasteful number, since it uses less digits than its factorization.

42043030402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21021515203.

The product of its (nonzero) digits is 2304, while the sum is 22.

Adding to 42043030402 its reverse (20403034024), we get a palindrome (62446064426).

The spelling of 42043030402 in words is "forty-two billion, forty-three million, thirty thousand, four hundred two".