1099025 has 6 divisors (see below), whose sum is σ = 1362822. Its totient is φ = 879200.

The previous prime is 1098989. The next prime is 1099031. The reversal of 1099025 is 5209901.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 192721 + 906304 = 439^2 + 952^2 .

It is not a de Polignac number, because 1099025 - 2¹⁶ = 1033489 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1098985 and 1099003.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21956 + ... + 22005.

It is an arithmetic number, because the mean of its divisors is an integer number (227137).

2^1099025 is an apocalyptic number.

It is an amenable number.

1099025 is a deficient number, since it is larger than the sum of its proper divisors (263797).

1099025 is an equidigital number, since it uses as much as digits as its factorization.

1099025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43971 (or 43966 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 1099025 is about 1048.3439321139. The cubic root of 1099025 is about 103.1975033448.

The spelling of 1099025 in words is "one million, ninety-nine thousand, twenty-five".