15000001 has 8 divisors (see below), whose sum is σ = 16395264. Its totient is φ = 13661760.

The previous prime is 14999981. The next prime is 15000017. The reversal of 15000001 is 10000051.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15000001 - 2⁵ = 14999969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15000031) 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 7 ways as a sum of consecutive naturals, for example, 13705 + ... + 14758.

It is an arithmetic number, because the mean of its divisors is an integer number (2049408).

Almost surely, 2^15000001 is an apocalyptic number.

It is an amenable number.

15000001 is a deficient number, since it is larger than the sum of its proper divisors (1395263).

15000001 is a wasteful number, since it uses less digits than its factorization.

15000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28511.

The product of its (nonzero) digits is 5, while the sum is 7.

The square root of 15000001 is about 3872.9834753069. The cubic root of 15000001 is about 246.6212129135.

Adding to 15000001 its reverse (10000051), we get a palindrome (25000052).

The spelling of 15000001 in words is "fifteen million, one", and thus it is an aban number and an uban number.