102250721 has 8 divisors (see below), whose sum is σ = 106496064. Its totient is φ = 98083440.

The previous prime is 102250711. The next prime is 102250769. The reversal of 102250721 is 127052201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 102250721 - 2⁶ = 102250657 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102250693 and 102250702.

It is not an unprimeable number, because it can be changed into a prime (102250711) 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 in 7 ways as a sum of consecutive naturals, for example, 16835 + ... + 22088.

It is an arithmetic number, because the mean of its divisors is an integer number (13312008).

Almost surely, 2^102250721 is an apocalyptic number.

It is an amenable number.

102250721 is a deficient number, since it is larger than the sum of its proper divisors (4245343).

102250721 is an equidigital number, since it uses as much as digits as its factorization.

102250721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39031.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 102250721 is about 10111.9098591710. The cubic root of 102250721 is about 467.6153866956.

The spelling of 102250721 in words is "one hundred two million, two hundred fifty thousand, seven hundred twenty-one".