1022749 has 8 divisors (see below), whose sum is σ = 1258880. Its totient is φ = 809136.

The previous prime is 1022729. The next prime is 1022761. The reversal of 1022749 is 9472201.

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 1022749 - 2⁹ = 1022237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022719) 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, 5529 + ... + 5710.

It is an arithmetic number, because the mean of its divisors is an integer number (157360).

2^1022749 is an apocalyptic number.

It is an amenable number.

1022749 is a deficient number, since it is larger than the sum of its proper divisors (236131).

1022749 is a wasteful number, since it uses less digits than its factorization.

1022749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11259.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 1022749 is about 1011.3105358890. The cubic root of 1022749 is about 100.7526213998.

It can be divided in two parts, 1022 and 749, that added together give a palindrome (1771).

The spelling of 1022749 in words is "one million, twenty-two thousand, seven hundred forty-nine".