102020845 has 8 divisors (see below), whose sum is σ = 126374400. Its totient is φ = 78983760.

The previous prime is 102020819. The next prime is 102020873. The reversal of 102020845 is 548020201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 102020845 - 2¹⁷ = 101889773 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 328945 + ... + 329254.

It is an arithmetic number, because the mean of its divisors is an integer number (15796800).

Almost surely, 2^102020845 is an apocalyptic number.

It is an amenable number.

102020845 is a deficient number, since it is larger than the sum of its proper divisors (24353555).

102020845 is an equidigital number, since it uses as much as digits as its factorization.

102020845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658235.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 102020845 is about 10100.5368669195. The cubic root of 102020845 is about 467.2646989984.

The spelling of 102020845 in words is "one hundred two million, twenty thousand, eight hundred forty-five".