102861807 has 16 divisors (see below), whose sum is σ = 139614720. Its totient is φ = 67352832.

The previous prime is 102861797. The next prime is 102861809. The reversal of 102861807 is 708168201.

It is a happy number.

It is not a de Polignac number, because 102861807 - 2⁴ = 102861791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102861809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39178 + ... + 41720.

It is an arithmetic number, because the mean of its divisors is an integer number (8725920).

Almost surely, 2^102861807 is an apocalyptic number.

102861807 is a deficient number, since it is larger than the sum of its proper divisors (36752913).

102861807 is a wasteful number, since it uses less digits than its factorization.

102861807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2782.

The product of its (nonzero) digits is 5376, while the sum is 33.

The square root of 102861807 is about 10142.0809994793. The cubic root of 102861807 is about 468.5450813464.

It can be divided in two parts, 1028 and 61807, that added together give a triangular number (62835 = T₃₅₄).

The spelling of 102861807 in words is "one hundred two million, eight hundred sixty-one thousand, eight hundred seven".