102811427 has 4 divisors (see below), whose sum is σ = 108859176. Its totient is φ = 96763680.

The previous prime is 102811421. The next prime is 102811447. The reversal of 102811427 is 724118201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 724118201 = 9803 ⋅73867.

It is a cyclic number.

It is not a de Polignac number, because 102811427 - 2⁴ = 102811411 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102811396 and 102811405.

It is not an unprimeable number, because it can be changed into a prime (102811421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3023849 + ... + 3023882.

It is an arithmetic number, because the mean of its divisors is an integer number (27214794).

Almost surely, 2^102811427 is an apocalyptic number.

102811427 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

102811427 is a deficient number, since it is larger than the sum of its proper divisors (6047749).

102811427 is an equidigital number, since it uses as much as digits as its factorization.

102811427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6047748.

The product of its (nonzero) digits is 896, while the sum is 26.

The square root of 102811427 is about 10139.5969841015. The cubic root of 102811427 is about 468.4685736618.

Adding to 102811427 its reverse (724118201), we get a palindrome (826929628).

The spelling of 102811427 in words is "one hundred two million, eight hundred eleven thousand, four hundred twenty-seven".