1098518 has 4 divisors (see below), whose sum is σ = 1647780. Its totient is φ = 549258.

The previous prime is 1098511. The next prime is 1098533. The reversal of 1098518 is 8158901.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8158901 = 223 ⋅36587.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1098511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274628 + ... + 274631.

It is an arithmetic number, because the mean of its divisors is an integer number (411945).

2^1098518 is an apocalyptic number.

1098518 is a deficient number, since it is larger than the sum of its proper divisors (549262).

1098518 is an equidigital number, since it uses as much as digits as its factorization.

1098518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549261.

The product of its (nonzero) digits is 2880, while the sum is 32.

The square root of 1098518 is about 1048.1020942637. The cubic root of 1098518 is about 103.1816319492.

The spelling of 1098518 in words is "one million, ninety-eight thousand, five hundred eighteen".