1122745 has 16 divisors (see below), whose sum is σ = 1516032. Its totient is φ = 792000.

The previous prime is 1122739. The next prime is 1122749. The reversal of 1122745 is 5472211.

It is a happy number.

It is not a de Polignac number, because 1122745 - 2¹⁹ = 598457 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 (1122749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1120 + ... + 1870.

It is an arithmetic number, because the mean of its divisors is an integer number (94752).

2^1122745 is an apocalyptic number.

It is an amenable number.

1122745 is a deficient number, since it is larger than the sum of its proper divisors (393287).

1122745 is a wasteful number, since it uses less digits than its factorization.

1122745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792.

The product of its digits is 560, while the sum is 22.

The square root of 1122745 is about 1059.5966213612. The cubic root of 1122745 is about 103.9346544634.

Adding to 1122745 its reverse (5472211), we get a palindrome (6594956).

The spelling of 1122745 in words is "one million, one hundred twenty-two thousand, seven hundred forty-five".