15485621 has 2 divisors, whose sum is σ = 15485622. Its totient is φ = 15485620.

The previous prime is 15485611. The next prime is 15485651. The reversal of 15485621 is 12658451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13608721 + 1876900 = 3689^2 + 1370^2 .

It is a cyclic number.

It is not a de Polignac number, because 15485621 - 2⁶ = 15485557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15485611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7742810 + 7742811.

It is an arithmetic number, because the mean of its divisors is an integer number (7742811).

Almost surely, 2^15485621 is an apocalyptic number.

It is an amenable number.

15485621 is a deficient number, since it is larger than the sum of its proper divisors (1).

15485621 is an equidigital number, since it uses as much as digits as its factorization.

15485621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9600, while the sum is 32.

The square root of 15485621 is about 3935.1773784672. The cubic root of 15485621 is about 249.2544240095.

The spelling of 15485621 in words is "fifteen million, four hundred eighty-five thousand, six hundred twenty-one".