42002242 has 4 divisors (see below), whose sum is σ = 63003366. Its totient is φ = 21001120.

The previous prime is 42002239. The next prime is 42002269. The reversal of 42002242 is 24220024.

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., 32936121 + 9066121 = 5739^2 + 3011^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500559 + ... + 10500562.

Almost surely, 2^42002242 is an apocalyptic number.

42002242 is a deficient number, since it is larger than the sum of its proper divisors (21001124).

42002242 is a wasteful number, since it uses less digits than its factorization.

42002242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21001123.

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 42002242 is about 6480.9136701548. The cubic root of 42002242 is about 347.6088494990.

Adding to 42002242 its reverse (24220024), we get a palindrome (66222266).

The spelling of 42002242 in words is "forty-two million, two thousand, two hundred forty-two".