102321857 has 4 divisors (see below), whose sum is σ = 111623856. Its totient is φ = 93019860.

The previous prime is 102321851. The next prime is 102321883. The reversal of 102321857 is 758123201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 102321857 - 2⁴ = 102321841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102321851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4650983 + ... + 4651004.

It is an arithmetic number, because the mean of its divisors is an integer number (27905964).

Almost surely, 2^102321857 is an apocalyptic number.

It is an amenable number.

102321857 is a deficient number, since it is larger than the sum of its proper divisors (9301999).

102321857 is an equidigital number, since it uses as much as digits as its factorization.

102321857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9301998.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 102321857 is about 10115.4266840307. The cubic root of 102321857 is about 467.7238018304.

The spelling of 102321857 in words is "one hundred two million, three hundred twenty-one thousand, eight hundred fifty-seven".