102095721 has 88 divisors (see below), whose sum is σ = 198403520. Its totient is φ = 51018336.

The previous prime is 102095713. The next prime is 102095737. The reversal of 102095721 is 127590201.

It is not a de Polignac number, because 102095721 - 2³ = 102095713 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (102095621) by changing a digit.

It is a polite number, since it can be written in 87 ways as a sum of consecutive naturals, for example, 5373450 + ... + 5373468.

Almost surely, 2^102095721 is an apocalyptic number.

It is an amenable number.

102095721 is a deficient number, since it is larger than the sum of its proper divisors (96307799).

102095721 is an frugal number, since it uses more digits than its factorization.

102095721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69 (or 42 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 102095721 is about 10104.2427227378. The cubic root of 102095721 is about 467.3789839951.

The spelling of 102095721 in words is "one hundred two million, ninety-five thousand, seven hundred twenty-one".