102675721 has 2 divisors, whose sum is σ = 102675722. Its totient is φ = 102675720.

The previous prime is 102675719. The next prime is 102675739. The reversal of 102675721 is 127576201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84732025 + 17943696 = 9205^2 + 4236^2 .

It is an emirp because it is prime and its reverse (127576201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102675721 - 2¹ = 102675719 is a prime.

Together with 102675719, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (102675821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51337860 + 51337861.

It is an arithmetic number, because the mean of its divisors is an integer number (51337861).

Almost surely, 2^102675721 is an apocalyptic number.

It is an amenable number.

102675721 is a deficient number, since it is larger than the sum of its proper divisors (1).

102675721 is an equidigital number, since it uses as much as digits as its factorization.

102675721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 102675721 is about 10132.9028910772. The cubic root of 102675721 is about 468.2623644554.

The spelling of 102675721 in words is "one hundred two million, six hundred seventy-five thousand, seven hundred twenty-one".