102485857 has 4 divisors (see below), whose sum is σ = 102526660. Its totient is φ = 102445056.

The previous prime is 102485839. The next prime is 102485879. The reversal of 102485857 is 758584201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 758584201 = 2273 ⋅333737.

It can be written as a sum of positive squares in 2 ways, for example, as 25765776 + 76720081 = 5076^2 + 8759^2 .

It is a cyclic number.

It is not a de Polignac number, because 102485857 - 2²³ = 94097249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102485807) 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, 16368 + ... + 21745.

It is an arithmetic number, because the mean of its divisors is an integer number (25631665).

Almost surely, 2^102485857 is an apocalyptic number.

It is an amenable number.

102485857 is a deficient number, since it is larger than the sum of its proper divisors (40803).

102485857 is an equidigital number, since it uses as much as digits as its factorization.

102485857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40802.

The product of its (nonzero) digits is 89600, while the sum is 40.

The square root of 102485857 is about 10123.5298685784. The cubic root of 102485857 is about 467.9735554371.

The spelling of 102485857 in words is "one hundred two million, four hundred eighty-five thousand, eight hundred fifty-seven".