1022149 has 4 divisors (see below), whose sum is σ = 1025100. Its totient is φ = 1019200.

The previous prime is 1022141. The next prime is 1022167. The reversal of 1022149 is 9412201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 986049 + 36100 = 993^2 + 190^2 .

It is a cyclic number.

It is not a de Polignac number, because 1022149 - 2³ = 1022141 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 (1022141) 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, 874 + ... + 1675.

It is an arithmetic number, because the mean of its divisors is an integer number (256275).

2^1022149 is an apocalyptic number.

It is an amenable number.

1022149 is a deficient number, since it is larger than the sum of its proper divisors (2951).

1022149 is an equidigital number, since it uses as much as digits as its factorization.

1022149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2950.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1022149 is about 1011.0138475807. The cubic root of 1022149 is about 100.7329152295.

The spelling of 1022149 in words is "one million, twenty-two thousand, one hundred forty-nine".