102279857 has 4 divisors (see below), whose sum is σ = 102530340. Its totient is φ = 102029376.

The previous prime is 102279851. The next prime is 102279889. The reversal of 102279857 is 758972201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 758972201 = 13 ⋅58382477.

It can be written as a sum of positive squares in 2 ways, for example, as 66650896 + 35628961 = 8164^2 + 5969^2 .

It is a cyclic number.

It is not a de Polignac number, because 102279857 - 2⁴ = 102279841 is a prime.

It is a super-2 number, since 2×102279857² = 20922338295880898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102279851) 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, 124628 + ... + 125445.

It is an arithmetic number, because the mean of its divisors is an integer number (25632585).

Almost surely, 2^102279857 is an apocalyptic number.

It is an amenable number.

102279857 is a deficient number, since it is larger than the sum of its proper divisors (250483).

102279857 is an equidigital number, since it uses as much as digits as its factorization.

102279857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250482.

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 102279857 is about 10113.3504339561. The cubic root of 102279857 is about 467.6597976229.

The spelling of 102279857 in words is "one hundred two million, two hundred seventy-nine thousand, eight hundred fifty-seven".