2972161 has 8 divisors (see below), whose sum is σ = 3162240. Its totient is φ = 2783808.

The previous prime is 2972159. The next prime is 2972171. The reversal of 2972161 is 1612792.

2972161 = 279² + 280² + ... + 312².

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2972161 - 2¹ = 2972159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2972141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5860 + ... + 6346.

It is an arithmetic number, because the mean of its divisors is an integer number (395280).

2^2972161 is an apocalyptic number.

It is an amenable number.

2972161 is a deficient number, since it is larger than the sum of its proper divisors (190079).

2972161 is a wasteful number, since it uses less digits than its factorization.

2972161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 863.

The product of its digits is 1512, while the sum is 28.

The square root of 2972161 is about 1723.9956496465. The cubic root of 2972161 is about 143.7774500824. Note that the first 3 decimals are identical.

The spelling of 2972161 in words is "two million, nine hundred seventy-two thousand, one hundred sixty-one".