102621 has 8 divisors (see below), whose sum is σ = 138880. Its totient is φ = 67392.

The previous prime is 102611. The next prime is 102643. The reversal of 102621 is 126201.

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

It is a de Polignac number, because none of the positive numbers 2^k-102621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102597 and 102606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21 + ... + 453.

It is an arithmetic number, because the mean of its divisors is an integer number (17360).

2¹⁰²⁶²¹ is an apocalyptic number.

It is an amenable number.

102621 is a deficient number, since it is larger than the sum of its proper divisors (36259).

102621 is an equidigital number, since it uses as much as digits as its factorization.

102621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 102621 is about 320.3451263872. The cubic root of 102621 is about 46.8179162903.

Adding to 102621 its reverse (126201), we get a palindrome (228822).

The spelling of 102621 in words is "one hundred two thousand, six hundred twenty-one".