102530621 has 4 divisors (see below), whose sum is σ = 108561852. Its totient is φ = 96499392.

The previous prime is 102530591. The next prime is 102530639. The reversal of 102530621 is 126035201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 70324996 + 32205625 = 8386^2 + 5675^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102530621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102530593 and 102530602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102530651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3015590 + ... + 3015623.

It is an arithmetic number, because the mean of its divisors is an integer number (27140463).

Almost surely, 2^102530621 is an apocalyptic number.

It is an amenable number.

102530621 is a deficient number, since it is larger than the sum of its proper divisors (6031231).

102530621 is an equidigital number, since it uses as much as digits as its factorization.

102530621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6031230.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 102530621 is about 10125.7405161302. The cubic root of 102530621 is about 468.0416796955.

Adding to 102530621 its reverse (126035201), we get a palindrome (228565822).

The spelling of 102530621 in words is "one hundred two million, five hundred thirty thousand, six hundred twenty-one".