1098001 has 4 divisors (see below), whose sum is σ = 1118772. Its totient is φ = 1077232.

The previous prime is 1097983. The next prime is 1098017. The reversal of 1098001 is 1008901.

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

It can be written as a sum of positive squares in 2 ways, for example, as 330625 + 767376 = 575^2 + 876^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1098001 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1098001.

It is not an unprimeable number, because it can be changed into a prime (1098101) 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, 10306 + ... + 10411.

It is an arithmetic number, because the mean of its divisors is an integer number (279693).

2^1098001 is an apocalyptic number.

It is an amenable number.

1098001 is a deficient number, since it is larger than the sum of its proper divisors (20771).

1098001 is an equidigital number, since it uses as much as digits as its factorization.

1098001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20770.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 1098001 is about 1047.8554289595. The cubic root of 1098001 is about 103.1654424786.

The spelling of 1098001 in words is "one million, ninety-eight thousand, one".