2772921 has 8 divisors (see below), whose sum is σ = 3914784. Its totient is φ = 1739840.

The previous prime is 2772901. The next prime is 2772923. The reversal of 2772921 is 1292772.

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 2772921 - 2⁹ = 2772409 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2772923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27135 + ... + 27236.

It is an arithmetic number, because the mean of its divisors is an integer number (489348).

2^2772921 is an apocalyptic number.

It is an amenable number.

2772921 is a deficient number, since it is larger than the sum of its proper divisors (1141863).

2772921 is a wasteful number, since it uses less digits than its factorization.

2772921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54391.

The product of its digits is 3528, while the sum is 30.

The square root of 2772921 is about 1665.2089958921. The cubic root of 2772921 is about 140.4901357883.

The spelling of 2772921 in words is "two million, seven hundred seventy-two thousand, nine hundred twenty-one".