15321401 has 2 divisors, whose sum is σ = 15321402. Its totient is φ = 15321400.

The previous prime is 15321379. The next prime is 15321443. The reversal of 15321401 is 10412351.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10569001 + 4752400 = 3251^2 + 2180^2 .

It is a cyclic number.

It is not a de Polignac number, because 15321401 - 2¹⁰ = 15320377 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15321401.

It is not a weakly prime, because it can be changed into another prime (15321451) 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, 7660700 + 7660701.

It is an arithmetic number, because the mean of its divisors is an integer number (7660701).

Almost surely, 2^15321401 is an apocalyptic number.

It is an amenable number.

15321401 is a deficient number, since it is larger than the sum of its proper divisors (1).

15321401 is an equidigital number, since it uses as much as digits as its factorization.

15321401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 15321401 is about 3914.2561234544. The cubic root of 15321401 is about 248.3702034752.

Adding to 15321401 its reverse (10412351), we get a palindrome (25733752).

The spelling of 15321401 in words is "fifteen million, three hundred twenty-one thousand, four hundred one".