202123242 has 16 divisors (see below), whose sum is σ = 449162880. Its totient is φ = 67374396.

The previous prime is 202123237. The next prime is 202123261. The reversal of 202123242 is 242321202.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1871458 + ... + 1871565.

It is an arithmetic number, because the mean of its divisors is an integer number (28072680).

Almost surely, 2^202123242 is an apocalyptic number.

202123242 is an abundant number, since it is smaller than the sum of its proper divisors (247039638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

202123242 is a wasteful number, since it uses less digits than its factorization.

202123242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3743034 (or 3743028 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 202123242 is about 14217.0053808810. The cubic root of 202123242 is about 586.8657329937.

Adding to 202123242 its reverse (242321202), we get a palindrome (444444444).

The spelling of 202123242 in words is "two hundred two million, one hundred twenty-three thousand, two hundred forty-two".