1098603521 has 8 divisors (see below), whose sum is σ = 1135499904. Its totient is φ = 1062270640.

The previous prime is 1098603481. The next prime is 1098603523. The reversal of 1098603521 is 1253068901.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1098603521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1098603523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136910 + ... + 144711.

It is an arithmetic number, because the mean of its divisors is an integer number (141937488).

Almost surely, 2^1098603521 is an apocalyptic number.

It is an amenable number.

1098603521 is a deficient number, since it is larger than the sum of its proper divisors (36896383).

1098603521 is an equidigital number, since it uses as much as digits as its factorization.

1098603521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281751.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 1098603521 is about 33145.1885045175. The cubic root of 1098603521 is about 1031.8430948607.

The spelling of 1098603521 in words is "one billion, ninety-eight million, six hundred three thousand, five hundred twenty-one".