1098149 has 8 divisors (see below), whose sum is σ = 1252440. Its totient is φ = 953856.

The previous prime is 1098133. The next prime is 1098151. The reversal of 1098149 is 9418901.

It can be written as a sum of positive squares in 4 ways, for example, as 37249 + 1060900 = 193^2 + 1030^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1098149 - 2⁴ = 1098133 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1098109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2264 + ... + 2705.

It is an arithmetic number, because the mean of its divisors is an integer number (156555).

2^1098149 is an apocalyptic number.

It is an amenable number.

1098149 is a deficient number, since it is larger than the sum of its proper divisors (154291).

1098149 is a wasteful number, since it uses less digits than its factorization.

1098149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4999.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 1098149 is about 1047.9260470090. The cubic root of 1098149 is about 103.1700775076.

The spelling of 1098149 in words is "one million, ninety-eight thousand, one hundred forty-nine".