1090898 has 4 divisors (see below), whose sum is σ = 1636350. Its totient is φ = 545448.

The previous prime is 1090897. The next prime is 1090909. The reversal of 1090898 is 8980901.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 966289 + 124609 = 983^2 + 353^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1090891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272723 + ... + 272726.

2^1090898 is an apocalyptic number.

1090898 is a deficient number, since it is larger than the sum of its proper divisors (545452).

1090898 is an equidigital number, since it uses as much as digits as its factorization.

1090898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545451.

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 1090898 is about 1044.4606263522. The cubic root of 1090898 is about 102.9425009770.

The spelling of 1090898 in words is "one million, ninety thousand, eight hundred ninety-eight".