102642277 has 4 divisors (see below), whose sum is σ = 108680076. Its totient is φ = 96604480.

The previous prime is 102642263. The next prime is 102642301. The reversal of 102642277 is 772246201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 772246201 = 401 ⋅1925801.

It can be written as a sum of positive squares in 2 ways, for example, as 74753316 + 27888961 = 8646^2 + 5281^2 .

It is a cyclic number.

It is not a de Polignac number, because 102642277 - 2²³ = 94253669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102642577) 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 in 3 ways as a sum of consecutive naturals, for example, 3018874 + ... + 3018907.

It is an arithmetic number, because the mean of its divisors is an integer number (27170019).

Almost surely, 2^102642277 is an apocalyptic number.

102642277 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

102642277 is a deficient number, since it is larger than the sum of its proper divisors (6037799).

102642277 is an equidigital number, since it uses as much as digits as its factorization.

102642277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6037798.

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 102642277 is about 10131.2524892039. The cubic root of 102642277 is about 468.2115174229.

Adding to 102642277 its reverse (772246201), we get a palindrome (874888478).

The spelling of 102642277 in words is "one hundred two million, six hundred forty-two thousand, two hundred seventy-seven".