42251602 has 4 divisors (see below), whose sum is σ = 63377406. Its totient is φ = 21125800.

The previous prime is 42251591. The next prime is 42251623. The reversal of 42251602 is 20615224.

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., 39425841 + 2825761 = 6279^2 + 1681^2 .

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 an unprimeable number.

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 as a sum of consecutive naturals, namely, 10562899 + ... + 10562902.

Almost surely, 2^42251602 is an apocalyptic number.

42251602 is a deficient number, since it is larger than the sum of its proper divisors (21125804).

42251602 is a wasteful number, since it uses less digits than its factorization.

42251602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21125803.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 42251602 is about 6500.1232296011. The cubic root of 42251602 is about 348.2953904068.

Adding to 42251602 its reverse (20615224), we get a palindrome (62866826).

The spelling of 42251602 in words is "forty-two million, two hundred fifty-one thousand, six hundred two".