1098611 has 4 divisors (see below), whose sum is σ = 1108800. Its totient is φ = 1088424.

The previous prime is 1098593. The next prime is 1098613. The reversal of 1098611 is 1168901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1168901 = 467 ⋅2503.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1098611 is a prime.

It is a super-2 number, since 2×1098611² = 2413892258642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1098613) 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, 4931 + ... + 5148.

It is an arithmetic number, because the mean of its divisors is an integer number (277200).

2^1098611 is an apocalyptic number.

1098611 is a deficient number, since it is larger than the sum of its proper divisors (10189).

1098611 is a wasteful number, since it uses less digits than its factorization.

1098611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10188.

The product of its (nonzero) digits is 432, while the sum is 26.

The square root of 1098611 is about 1048.1464592317. The cubic root of 1098611 is about 103.1845436360.

The spelling of 1098611 in words is "one million, ninety-eight thousand, six hundred eleven".