1098641 has 8 divisors (see below), whose sum is σ = 1178304. Its totient is φ = 1021680.

The previous prime is 1098631. The next prime is 1098649. The reversal of 1098641 is 1468901.

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 1098641 - 2¹⁸ = 836497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1098649) 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, 206 + ... + 1496.

It is an arithmetic number, because the mean of its divisors is an integer number (147288).

2^1098641 is an apocalyptic number.

It is an amenable number.

1098641 is a deficient number, since it is larger than the sum of its proper divisors (79663).

1098641 is a wasteful number, since it uses less digits than its factorization.

1098641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1351.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 1098641 is about 1048.1607701112. The cubic root of 1098641 is about 103.1854828547.

The spelling of 1098641 in words is "one million, ninety-eight thousand, six hundred forty-one".