15671121 has 4 divisors (see below), whose sum is σ = 20894832. Its totient is φ = 10447412.

The previous prime is 15671111. The next prime is 15671171. The reversal of 15671121 is 12117651.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 15671121 - 2⁶ = 15671057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15671091 and 15671100.

It is not an unprimeable number, because it can be changed into a prime (15671101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2611851 + ... + 2611856.

It is an arithmetic number, because the mean of its divisors is an integer number (5223708).

Almost surely, 2^15671121 is an apocalyptic number.

It is an amenable number.

15671121 is a deficient number, since it is larger than the sum of its proper divisors (5223711).

15671121 is an equidigital number, since it uses as much as digits as its factorization.

15671121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5223710.

The product of its digits is 420, while the sum is 24.

The square root of 15671121 is about 3958.6766728289. The cubic root of 15671121 is about 250.2457370408.

Adding to 15671121 its reverse (12117651), we get a palindrome (27788772).

The spelling of 15671121 in words is "fifteen million, six hundred seventy-one thousand, one hundred twenty-one".