102642262 has 4 divisors (see below), whose sum is σ = 153963396. Its totient is φ = 51321130.

The previous prime is 102642259. The next prime is 102642263. The reversal of 102642262 is 262246201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 262246201 = 7 ⋅37463743.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102642263) 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, 25660564 + ... + 25660567.

It is an arithmetic number, because the mean of its divisors is an integer number (38490849).

Almost surely, 2^102642262 is an apocalyptic number.

102642262 is a deficient number, since it is larger than the sum of its proper divisors (51321134).

102642262 is an equidigital number, since it uses as much as digits as its factorization.

102642262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51321133.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 102642262 is about 10131.2517489203. The cubic root of 102642262 is about 468.2114946150.

Adding to 102642262 its reverse (262246201), we get a palindrome (364888463).

The spelling of 102642262 in words is "one hundred two million, six hundred forty-two thousand, two hundred sixty-two".