15001121 has 8 divisors (see below), whose sum is σ = 15417864. Its totient is φ = 14586880.

The previous prime is 15001111. The next prime is 15001139. The reversal of 15001121 is 12110051.

It can be written as a sum of positive squares in 4 ways, for example, as 286225 + 14714896 = 535^2 + 3836^2 .

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 15001121 - 2⁶ = 15001057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15001111) 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, 24005 + ... + 24621.

It is an arithmetic number, because the mean of its divisors is an integer number (1927233).

Almost surely, 2^15001121 is an apocalyptic number.

It is an amenable number.

15001121 is a deficient number, since it is larger than the sum of its proper divisors (416743).

15001121 is an equidigital number, since it uses as much as digits as its factorization.

15001121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1251.

The product of its (nonzero) digits is 10, while the sum is 11.

The square root of 15001121 is about 3873.1280639814. The cubic root of 15001121 is about 246.6273508883.

Adding to 15001121 its reverse (12110051), we get a palindrome (27111172).

The spelling of 15001121 in words is "fifteen million, one thousand, one hundred twenty-one".