102705172 has 6 divisors (see below), whose sum is σ = 179734058. Its totient is φ = 51352584.

The previous prime is 102705157. The next prime is 102705173. The reversal of 102705172 is 271507201.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 101525776 + 1179396 = 10076^2 + 1086^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102705173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12838143 + ... + 12838150.

Almost surely, 2^102705172 is an apocalyptic number.

It is an amenable number.

102705172 is a deficient number, since it is larger than the sum of its proper divisors (77028886).

102705172 is a wasteful number, since it uses less digits than its factorization.

102705172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25676297 (or 25676295 counting only the distinct ones).

The product of its (nonzero) digits is 980, while the sum is 25.

The square root of 102705172 is about 10134.3560229548. The cubic root of 102705172 is about 468.3071315351.

The spelling of 102705172 in words is "one hundred two million, seven hundred five thousand, one hundred seventy-two".