1203116555 has 4 divisors (see below), whose sum is σ = 1443739872. Its totient is φ = 962493240.

The previous prime is 1203116549. The next prime is 1203116561. The reversal of 1203116555 is 5556113021.

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

It is an interprime number because it is at equal distance from previous prime (1203116549) and next prime (1203116561).

It is not a de Polignac number, because 1203116555 - 2¹⁰ = 1203115531 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120311651 + ... + 120311660.

It is an arithmetic number, because the mean of its divisors is an integer number (360934968).

Almost surely, 2^1203116555 is an apocalyptic number.

1203116555 is a deficient number, since it is larger than the sum of its proper divisors (240623317).

1203116555 is an equidigital number, since it uses as much as digits as its factorization.

1203116555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240623316.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 1203116555 is about 34685.9705788954. The cubic root of 1203116555 is about 1063.5777277715.

Adding to 1203116555 its reverse (5556113021), we get a palindrome (6759229576).

The spelling of 1203116555 in words is "one billion, two hundred three million, one hundred sixteen thousand, five hundred fifty-five".