102651621 has 16 divisors (see below), whose sum is σ = 141641280. Its totient is φ = 66084480.

The previous prime is 102651617. The next prime is 102651629. The reversal of 102651621 is 126156201.

It is not a de Polignac number, because 102651621 - 2² = 102651617 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102651591 and 102651600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102651629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7011 + ... + 15951.

It is an arithmetic number, because the mean of its divisors is an integer number (8852580).

Almost surely, 2^102651621 is an apocalyptic number.

It is an amenable number.

102651621 is a deficient number, since it is larger than the sum of its proper divisors (38989659).

102651621 is an equidigital number, since it uses as much as digits as its factorization.

102651621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9076.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 102651621 is about 10131.7136260358. The cubic root of 102651621 is about 468.2257248100.

The spelling of 102651621 in words is "one hundred two million, six hundred fifty-one thousand, six hundred twenty-one".