102857149 has 4 divisors (see below), whose sum is σ = 102879036. Its totient is φ = 102835264.

The previous prime is 102857147. The next prime is 102857177. The reversal of 102857149 is 941758201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 59059225 + 43797924 = 7685^2 + 6618^2 .

It is a cyclic number.

It is not a de Polignac number, because 102857149 - 2¹ = 102857147 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 (102857143) 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, 694 + ... + 14359.

It is an arithmetic number, because the mean of its divisors is an integer number (25719759).

Almost surely, 2^102857149 is an apocalyptic number.

It is an amenable number.

102857149 is a deficient number, since it is larger than the sum of its proper divisors (21887).

102857149 is an equidigital number, since it uses as much as digits as its factorization.

102857149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21886.

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 102857149 is about 10141.8513595891. The cubic root of 102857149 is about 468.5380086988.

The spelling of 102857149 in words is "one hundred two million, eight hundred fifty-seven thousand, one hundred forty-nine".