4042420402 has 4 divisors (see below), whose sum is σ = 6063630606. Its totient is φ = 2021210200.

The previous prime is 4042420397. The next prime is 4042420409. The reversal of 4042420402 is 2040242404.

4042420402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 2227745601 + 1814674801 = 47199^2 + 42599^2 .

It is not an unprimeable number, because it can be changed into a prime (4042420409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010605099 + ... + 1010605102.

Almost surely, 2^4042420402 is an apocalyptic number.

4042420402 is a deficient number, since it is larger than the sum of its proper divisors (2021210204).

4042420402 is a wasteful number, since it uses less digits than its factorization.

4042420402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2021210203.

The product of its (nonzero) digits is 2048, while the sum is 22.

The square root of 4042420402 is about 63580.0314721533. The cubic root of 4042420402 is about 1592.9928470217.

Adding to 4042420402 its reverse (2040242404), we get a palindrome (6082662806).

The spelling of 4042420402 in words is "four billion, forty-two million, four hundred twenty thousand, four hundred two".