7171961 has 4 divisors (see below), whose sum is σ = 7419300. Its totient is φ = 6924624.

The previous prime is 7171951. The next prime is 7171979. The reversal of 7171961 is 1691717.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1691717 = 71 ⋅23827.

It can be written as a sum of positive squares in 2 ways, for example, as 3171961 + 4000000 = 1781^2 + 2000^2 .

It is a cyclic number.

It is not a de Polignac number, because 7171961 - 2¹⁸ = 6909817 is a prime.

It is a super-3 number, since 3×7171961³ (a number of 22 digits) contains 333 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7171951) 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, 123626 + ... + 123683.

It is an arithmetic number, because the mean of its divisors is an integer number (1854825).

Almost surely, 2^7171961 is an apocalyptic number.

It is an amenable number.

7171961 is a deficient number, since it is larger than the sum of its proper divisors (247339).

7171961 is a wasteful number, since it uses less digits than its factorization.

7171961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247338.

The product of its digits is 2646, while the sum is 32.

The square root of 7171961 is about 2678.0517172004. The cubic root of 7171961 is about 192.8468901206.

The spelling of 7171961 in words is "seven million, one hundred seventy-one thousand, nine hundred sixty-one".