1090651 has 4 divisors (see below), whose sum is σ = 1100952. Its totient is φ = 1080352.

The previous prime is 1090627. The next prime is 1090681. The reversal of 1090651 is 1560901.

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

It is a cyclic number.

It is not a de Polignac number, because 1090651 - 2¹¹ = 1088603 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1090681) 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, 4990 + ... + 5203.

It is an arithmetic number, because the mean of its divisors is an integer number (275238).

2^1090651 is an apocalyptic number.

1090651 is the 661-st centered pentagonal number.

1090651 is a deficient number, since it is larger than the sum of its proper divisors (10301).

1090651 is a wasteful number, since it uses less digits than its factorization.

1090651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10300.

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 1090651 is about 1044.3423768094. The cubic root of 1090651 is about 102.9347310122.

The spelling of 1090651 in words is "one million, ninety thousand, six hundred fifty-one".