2971221 has 16 divisors (see below), whose sum is σ = 4354560. Its totient is φ = 1787120.

The previous prime is 2971193. The next prime is 2971223. The reversal of 2971221 is 1221792.

It is a cyclic number.

It is not a de Polignac number, because 2971221 - 2⁷ = 2971093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2971191 and 2971200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2971223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5656 + ... + 6158.

It is an arithmetic number, because the mean of its divisors is an integer number (272160).

2^2971221 is an apocalyptic number.

It is an amenable number.

2971221 is a deficient number, since it is larger than the sum of its proper divisors (1383339).

2971221 is a wasteful number, since it uses less digits than its factorization.

2971221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696.

The product of its digits is 504, while the sum is 24.

The square root of 2971221 is about 1723.7230055899. The cubic root of 2971221 is about 143.7622910725.

The spelling of 2971221 in words is "two million, nine hundred seventy-one thousand, two hundred twenty-one".