1090857 has 4 divisors (see below), whose sum is σ = 1454480. Its totient is φ = 727236.

The previous prime is 1090849. The next prime is 1090877. The reversal of 1090857 is 7580901.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7580901 = 3 ⋅2526967.

It is not a de Polignac number, because 1090857 - 2³ = 1090849 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1090807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181807 + ... + 181812.

It is an arithmetic number, because the mean of its divisors is an integer number (363620).

2^1090857 is an apocalyptic number.

It is an amenable number.

1090857 is a deficient number, since it is larger than the sum of its proper divisors (363623).

1090857 is an equidigital number, since it uses as much as digits as its factorization.

1090857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363622.

The product of its (nonzero) digits is 2520, while the sum is 30.

The square root of 1090857 is about 1044.4409988123. The cubic root of 1090857 is about 102.9412113069.

The spelling of 1090857 in words is "one million, ninety thousand, eight hundred fifty-seven".