971121 has 4 divisors (see below), whose sum is σ = 1294832. Its totient is φ = 647412.

The previous prime is 971111. The next prime is 971141. The reversal of 971121 is 121179.

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 de Polignac number, because none of the positive numbers 2^k-971121 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (971111) 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, 161851 + ... + 161856.

It is an arithmetic number, because the mean of its divisors is an integer number (323708).

2⁹⁷¹¹²¹ is an apocalyptic number.

It is an amenable number.

971121 is a deficient number, since it is larger than the sum of its proper divisors (323711).

971121 is a wasteful number, since it uses less digits than its factorization.

971121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323710.

The product of its digits is 126, while the sum is 21.

The square root of 971121 is about 985.4547173767. The cubic root of 971121 is about 99.0279484402.

The spelling of 971121 in words is "nine hundred seventy-one thousand, one hundred twenty-one".