2971881 has 18 divisors (see below), whose sum is σ = 4720170. Its totient is φ = 1800480.

The previous prime is 2971879. The next prime is 2971883. The reversal of 2971881 is 1881792.

It is an interprime number because it is at equal distance from previous prime (2971879) and next prime (2971883).

It can be written as a sum of positive squares in only one way, i.e., 2944656 + 27225 = 1716^2 + 165^2 .

It is not a de Polignac number, because 2971881 - 2¹ = 2971879 is a prime.

It is a super-2 number, since 2×2971881² = 17664153356322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2971883) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 276 + ... + 2453.

2^2971881 is an apocalyptic number.

It is an amenable number.

2971881 is a deficient number, since it is larger than the sum of its proper divisors (1748289).

2971881 is a wasteful number, since it uses less digits than its factorization.

2971881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2757 (or 2743 counting only the distinct ones).

The product of its digits is 8064, while the sum is 36.

The square root of 2971881 is about 1723.9144410324. The cubic root of 2971881 is about 143.7729349669.

The spelling of 2971881 in words is "two million, nine hundred seventy-one thousand, eight hundred eighty-one".