102105851 has 2 divisors, whose sum is σ = 102105852. Its totient is φ = 102105850.

The previous prime is 102105823. The next prime is 102105863. The reversal of 102105851 is 158501201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 102105851 - 2²⁶ = 34996987 is a prime.

It is not a weakly prime, because it can be changed into another prime (102105151) 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, 51052925 + 51052926.

It is an arithmetic number, because the mean of its divisors is an integer number (51052926).

Almost surely, 2^102105851 is an apocalyptic number.

102105851 is a deficient number, since it is larger than the sum of its proper divisors (1).

102105851 is an equidigital number, since it uses as much as digits as its factorization.

102105851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 400, while the sum is 23.

The square root of 102105851 is about 10104.7439848816. The cubic root of 102105851 is about 467.3944413603.

It can be divided in two parts, 10210 and 5851, that added together give a palindrome (16061).

The spelling of 102105851 in words is "one hundred two million, one hundred five thousand, eight hundred fifty-one".