102406427 has 4 divisors (see below), whose sum is σ = 102479520. Its totient is φ = 102333336.

The previous prime is 102406393. The next prime is 102406429. The reversal of 102406427 is 724604201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 724604201 = 8269 ⋅87629.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102406427 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102406396 and 102406405.

It is not an unprimeable number, because it can be changed into a prime (102406429) 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, 34403 + ... + 37260.

It is an arithmetic number, because the mean of its divisors is an integer number (25619880).

Almost surely, 2^102406427 is an apocalyptic number.

102406427 is a deficient number, since it is larger than the sum of its proper divisors (73093).

102406427 is an equidigital number, since it uses as much as digits as its factorization.

102406427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73092.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 102406427 is about 10119.6060694080. The cubic root of 102406427 is about 467.8526257541.

The spelling of 102406427 in words is "one hundred two million, four hundred six thousand, four hundred twenty-seven".