2920945 has 8 divisors (see below), whose sum is σ = 3514536. Its totient is φ = 2330496.

The previous prime is 2920943. The next prime is 2920969. The reversal of 2920945 is 5490292.

2920945 = 1208² + 1209².

2920945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 20736 + 2900209 = 144^2 + 1703^2 .

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 2920945 - 2¹ = 2920943 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2920943) 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 7 ways as a sum of consecutive naturals, for example, 2589 + ... + 3541.

It is an arithmetic number, because the mean of its divisors is an integer number (439317).

2^2920945 is an apocalyptic number.

2920945 is the 1209-th centered square number.

It is an amenable number.

2920945 is a deficient number, since it is larger than the sum of its proper divisors (593591).

2920945 is an equidigital number, since it uses as much as digits as its factorization.

2920945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1571.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 2920945 is about 1709.0772364057. The cubic root of 2920945 is about 142.9468072817.

The spelling of 2920945 in words is "two million, nine hundred twenty thousand, nine hundred forty-five".