102721882 has 4 divisors (see below), whose sum is σ = 154082826. Its totient is φ = 51360940.

The previous prime is 102721873. The next prime is 102721909. The reversal of 102721882 is 288127201.

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

It can be written as a sum of positive squares in only one way, i.e., 53567761 + 49154121 = 7319^2 + 7011^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25680469 + ... + 25680472.

Almost surely, 2^102721882 is an apocalyptic number.

102721882 is a deficient number, since it is larger than the sum of its proper divisors (51360944).

102721882 is an equidigital number, since it uses as much as digits as its factorization.

102721882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51360943.

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 102721882 is about 10135.1804127998. The cubic root of 102721882 is about 468.3325278147.

The spelling of 102721882 in words is "one hundred two million, seven hundred twenty-one thousand, eight hundred eighty-two".