1022945 has 16 divisors (see below), whose sum is σ = 1531008. Its totient is φ = 637440.

The previous prime is 1022933. The next prime is 1022963. The reversal of 1022945 is 5492201.

It is not a de Polignac number, because 1022945 - 2⁴ = 1022929 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1022945.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 944 + ... + 1713.

It is an arithmetic number, because the mean of its divisors is an integer number (95688).

2^1022945 is an apocalyptic number.

It is an amenable number.

1022945 is a deficient number, since it is larger than the sum of its proper divisors (508063).

1022945 is a wasteful number, since it uses less digits than its factorization.

1022945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2680.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1022945 is about 1011.4074352110. The cubic root of 1022945 is about 100.7590570787.

The spelling of 1022945 in words is "one million, twenty-two thousand, nine hundred forty-five".