15230421 has 12 divisors (see below), whose sum is σ = 22594572. Its totient is φ = 9878976.

The previous prime is 15230407. The next prime is 15230441. The reversal of 15230421 is 12403251.

15230421 is a `hidden beast` number, since 15 + 230 + 421 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 8910225 + 6320196 = 2985^2 + 2514^2 .

It is not a de Polignac number, because 15230421 - 2⁵ = 15230389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15230394 and 15230403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15230441) 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 in 11 ways as a sum of consecutive naturals, for example, 22536 + ... + 23201.

It is an arithmetic number, because the mean of its divisors is an integer number (1882881).

Almost surely, 2^15230421 is an apocalyptic number.

It is an amenable number.

15230421 is a deficient number, since it is larger than the sum of its proper divisors (7364151).

15230421 is a wasteful number, since it uses less digits than its factorization.

15230421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45780 (or 45777 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 15230421 is about 3902.6171987527. The cubic root of 15230421 is about 247.8776115239.

Adding to 15230421 its reverse (12403251), we get a palindrome (27633672).

It can be divided in two parts, 15230 and 421, that added together give a palindrome (15651).

The spelling of 15230421 in words is "fifteen million, two hundred thirty thousand, four hundred twenty-one".