15421541 has 2 divisors, whose sum is σ = 15421542. Its totient is φ = 15421540.

The previous prime is 15421529. The next prime is 15421543. The reversal of 15421541 is 14512451.

15421541 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12602500 + 2819041 = 3550^2 + 1679^2 .

It is a cyclic number.

It is not a de Polignac number, because 15421541 - 2¹⁴ = 15405157 is a prime.

Together with 15421543, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15421543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7710770 + 7710771.

It is an arithmetic number, because the mean of its divisors is an integer number (7710771).

Almost surely, 2^15421541 is an apocalyptic number.

It is an amenable number.

15421541 is a deficient number, since it is larger than the sum of its proper divisors (1).

15421541 is an equidigital number, since it uses as much as digits as its factorization.

15421541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 800, while the sum is 23.

The square root of 15421541 is about 3927.0269925225. The cubic root of 15421541 is about 248.9101410675.

Adding to 15421541 its reverse (14512451), we get a palindrome (29933992).

The spelling of 15421541 in words is "fifteen million, four hundred twenty-one thousand, five hundred forty-one".