102542422 has 4 divisors (see below), whose sum is σ = 153813636. Its totient is φ = 51271210.

The previous prime is 102542417. The next prime is 102542423. The reversal of 102542422 is 224245201.

It is a semiprime because it is the product of two primes.

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 a junction number, because it is equal to n+sod(n) for n = 102542393 and 102542402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102542423) by changing a digit.

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 as a sum of consecutive naturals, namely, 25635604 + ... + 25635607.

It is an arithmetic number, because the mean of its divisors is an integer number (38453409).

Almost surely, 2^102542422 is an apocalyptic number.

102542422 is a deficient number, since it is larger than the sum of its proper divisors (51271214).

102542422 is an equidigital number, since it uses as much as digits as its factorization.

102542422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51271213.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 102542422 is about 10126.3232221769. The cubic root of 102542422 is about 468.0596357881.

Adding to 102542422 its reverse (224245201), we get a palindrome (326787623).

The spelling of 102542422 in words is "one hundred two million, five hundred forty-two thousand, four hundred twenty-two".