2912921 has 4 divisors (see below), whose sum is σ = 3177744. Its totient is φ = 2648100.

The previous prime is 2912893. The next prime is 2912929. The reversal of 2912921 is 1292192.

It is a happy number.

2912921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2912921 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2912929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132395 + ... + 132416.

It is an arithmetic number, because the mean of its divisors is an integer number (794436).

2^2912921 is an apocalyptic number.

It is an amenable number.

2912921 is a deficient number, since it is larger than the sum of its proper divisors (264823).

2912921 is a wasteful number, since it uses less digits than its factorization.

2912921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264822.

The product of its digits is 648, while the sum is 26.

The square root of 2912921 is about 1706.7281564444. The cubic root of 2912921 is about 142.8157929372.

The spelling of 2912921 in words is "two million, nine hundred twelve thousand, nine hundred twenty-one".