1098541 has 2 divisors, whose sum is σ = 1098542. Its totient is φ = 1098540.

The previous prime is 1098533. The next prime is 1098593. The reversal of 1098541 is 1458901.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 594441 + 504100 = 771^2 + 710^2 .

It is a cyclic number.

It is not a de Polignac number, because 1098541 - 2³ = 1098533 is a prime.

It is a Chen prime.

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

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1098511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 549270 + 549271.

It is an arithmetic number, because the mean of its divisors is an integer number (549271).

2^1098541 is an apocalyptic number.

It is an amenable number.

1098541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1098541 is an equidigital number, since it uses as much as digits as its factorization.

1098541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 1098541 is about 1048.1130664198. The cubic root of 1098541 is about 103.1823520591.

It can be divided in two parts, 10985 and 41, that added together give a triangular number (11026 = T₁₄₈).

The spelling of 1098541 in words is "one million, ninety-eight thousand, five hundred forty-one".