1098915 has 16 divisors (see below), whose sum is σ = 1788576. Its totient is φ = 576000.

The previous prime is 1098847. The next prime is 1098953. The reversal of 1098915 is 5198901.

It is not a de Polignac number, because 1098915 - 2⁷ = 1098787 is a prime.

It is a super-2 number, since 2×1098915² = 2415228354450, which contains 22 as substring.

It is a plaindrome in base 7.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 315 + ... + 1515.

It is an arithmetic number, because the mean of its divisors is an integer number (111786).

2^1098915 is an apocalyptic number.

1098915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1098915 is a deficient number, since it is larger than the sum of its proper divisors (689661).

1098915 is a wasteful number, since it uses less digits than its factorization.

1098915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1270.

The product of its (nonzero) digits is 3240, while the sum is 33.

The square root of 1098915 is about 1048.2914671025. The cubic root of 1098915 is about 103.1940602615.

The spelling of 1098915 in words is "one million, ninety-eight thousand, nine hundred fifteen".