1090745 has 4 divisors (see below), whose sum is σ = 1308900. Its totient is φ = 872592.

The previous prime is 1090721. The next prime is 1090757. The reversal of 1090745 is 5470901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5470901 = 139 ⋅39359.

It can be written as a sum of positive squares in 2 ways, for example, as 273529 + 817216 = 523^2 + 904^2 .

It is a cyclic number.

It is not a de Polignac number, because 1090745 - 2⁶ = 1090681 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109070 + ... + 109079.

It is an arithmetic number, because the mean of its divisors is an integer number (327225).

2^1090745 is an apocalyptic number.

It is an amenable number.

1090745 is a deficient number, since it is larger than the sum of its proper divisors (218155).

1090745 is an equidigital number, since it uses as much as digits as its factorization.

1090745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218154.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 1090745 is about 1044.3873802378. The cubic root of 1090745 is about 102.9376881411.

The spelling of 1090745 in words is "one million, ninety thousand, seven hundred forty-five".