1204111553 has 8 divisors (see below), whose sum is σ = 1216228608. Its totient is φ = 1192010704.

The previous prime is 1204111549. The next prime is 1204111621. The reversal of 1204111553 is 3551114021.

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 1204111553 - 2² = 1204111549 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1204101553) 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, 191975 + ... + 198147.

It is an arithmetic number, because the mean of its divisors is an integer number (152028576).

Almost surely, 2^1204111553 is an apocalyptic number.

It is an amenable number.

1204111553 is a deficient number, since it is larger than the sum of its proper divisors (12117055).

1204111553 is a wasteful number, since it uses less digits than its factorization.

1204111553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8103.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 1204111553 is about 34700.3105605699. The cubic root of 1204111553 is about 1063.8708459816.

Adding to 1204111553 its reverse (3551114021), we get a palindrome (4755225574).

The spelling of 1204111553 in words is "one billion, two hundred four million, one hundred eleven thousand, five hundred fifty-three".