12290521 has 2 divisors, whose sum is σ = 12290522. Its totient is φ = 12290520.

The previous prime is 12290503. The next prime is 12290567. The reversal of 12290521 is 12509221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10497600 + 1792921 = 3240^2 + 1339^2 .

It is an emirp because it is prime and its reverse (12509221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12290521 - 2⁵ = 12290489 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12290492 and 12290501.

It is not a weakly prime, because it can be changed into another prime (12290501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6145260 + 6145261.

It is an arithmetic number, because the mean of its divisors is an integer number (6145261).

Almost surely, 2^12290521 is an apocalyptic number.

It is an amenable number.

12290521 is a deficient number, since it is larger than the sum of its proper divisors (1).

12290521 is an equidigital number, since it uses as much as digits as its factorization.

12290521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 12290521 is about 3505.7839351563. The cubic root of 12290521 is about 230.7757110345.

Adding to 12290521 its reverse (12509221), we get a palindrome (24799742).

The spelling of 12290521 in words is "twelve million, two hundred ninety thousand, five hundred twenty-one".