42106402 has 16 divisors (see below), whose sum is σ = 68520312. Its totient is φ = 19290240.

The previous prime is 42106397. The next prime is 42106403. The reversal of 42106402 is 20460124.

It can be written as a sum of positive squares in 4 ways, for example, as 22667121 + 19439281 = 4761^2 + 4409^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 42106402.

It is not an unprimeable number, because it can be changed into a prime (42106403) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 2349 + ... + 9472.

Almost surely, 2^42106402 is an apocalyptic number.

42106402 is a deficient number, since it is larger than the sum of its proper divisors (26413910).

42106402 is a wasteful number, since it uses less digits than its factorization.

42106402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11973.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 42106402 is about 6488.9445983149. The cubic root of 42106402 is about 347.8959536133.

Adding to 42106402 its reverse (20460124), we get a palindrome (62566526).

The spelling of 42106402 in words is "forty-two million, one hundred six thousand, four hundred two".