15366401 has 4 divisors (see below), whose sum is σ = 15430404. Its totient is φ = 15302400.

The previous prime is 15366397. The next prime is 15366457. The reversal of 15366401 is 10466351.

It is a Cunningham number, because it is equal to 3920²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11560000 + 3806401 = 3400^2 + 1951^2 .

It is a cyclic number.

It is not a de Polignac number, because 15366401 - 2² = 15366397 is a prime.

It is a super-3 number, since 3×15366401³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15366101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31640 + ... + 32121.

It is an arithmetic number, because the mean of its divisors is an integer number (3857601).

Almost surely, 2^15366401 is an apocalyptic number.

It is an amenable number.

15366401 is a deficient number, since it is larger than the sum of its proper divisors (64003).

15366401 is an equidigital number, since it uses as much as digits as its factorization.

15366401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64002.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 15366401 is about 3920.0001275510. Note that the first 3 decimals coincide. The cubic root of 15366401 is about 248.6131258809.

The spelling of 15366401 in words is "fifteen million, three hundred sixty-six thousand, four hundred one".