102030521 has 4 divisors (see below), whose sum is σ = 102064500. Its totient is φ = 101996544.

The previous prime is 102030493. The next prime is 102030541. The reversal of 102030521 is 125030201.

It is a happy number.

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 15912121 + 86118400 = 3989^2 + 9280^2 .

It is a cyclic number.

It is not a de Polignac number, because 102030521 - 2¹⁴ = 102014137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102030496 and 102030505.

It is not an unprimeable number, because it can be changed into a prime (102030541) 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, 11996 + ... + 18653.

It is an arithmetic number, because the mean of its divisors is an integer number (25516125).

Almost surely, 2^102030521 is an apocalyptic number.

It is an amenable number.

102030521 is a deficient number, since it is larger than the sum of its proper divisors (33979).

102030521 is an equidigital number, since it uses as much as digits as its factorization.

102030521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33978.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 102030521 is about 10101.0158400034. The cubic root of 102030521 is about 467.2794708499.

Adding to 102030521 its reverse (125030201), we get a palindrome (227060722).

The spelling of 102030521 in words is "one hundred two million, thirty thousand, five hundred twenty-one".