102092921 has 20 divisors (see below), whose sum is σ = 120566244. Its totient is φ = 86436000.

The previous prime is 102092899. The next prime is 102092927. The reversal of 102092921 is 129290201.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 44408896 + 57684025 = 6664^2 + 7595^2 .

It is not a de Polignac number, because 102092921 - 2⁶ = 102092857 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102092927) 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 19 ways as a sum of consecutive naturals, for example, 242291 + ... + 242711.

Almost surely, 2^102092921 is an apocalyptic number.

It is an amenable number.

102092921 is a deficient number, since it is larger than the sum of its proper divisors (18473323).

102092921 is an frugal number, since it uses more digits than its factorization.

102092921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550 (or 529 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 102092921 is about 10104.1041661297. The cubic root of 102092921 is about 467.3747112952.

The spelling of 102092921 in words is "one hundred two million, ninety-two thousand, nine hundred twenty-one".