102091206 has 64 divisors (see below), whose sum is σ = 240768000. Its totient is φ = 28844928.

The previous prime is 102091201. The next prime is 102091243. The reversal of 102091206 is 602190201.

It is a super-2 number, since 2×102091206² = 20845228685068872, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102091201) 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 31 ways as a sum of consecutive naturals, for example, 232335 + ... + 232773.

It is an arithmetic number, because the mean of its divisors is an integer number (3762000).

Almost surely, 2^102091206 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 102091206, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120384000).

102091206 is an abundant number, since it is smaller than the sum of its proper divisors (138676794).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102091206 is a wasteful number, since it uses less digits than its factorization.

102091206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578 (or 564 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 102091206 is about 10104.0192992690. The cubic root of 102091206 is about 467.3720942280.

The spelling of 102091206 in words is "one hundred two million, ninety-one thousand, two hundred six".