1203120045 has 24 divisors (see below), whose sum is σ = 2098703256. Its totient is φ = 637573248.

The previous prime is 1203120029. The next prime is 1203120047. The reversal of 1203120045 is 5400213021.

It can be written as a sum of positive squares in 4 ways, for example, as 8311689 + 1194808356 = 2883^2 + 34566^2 .

It is not a de Polignac number, because 1203120045 - 2⁴ = 1203120029 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1203120047) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 78082 + ... + 92211.

It is an arithmetic number, because the mean of its divisors is an integer number (87445969).

Almost surely, 2^1203120045 is an apocalyptic number.

1203120045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1203120045 is a deficient number, since it is larger than the sum of its proper divisors (895583211).

1203120045 is a wasteful number, since it uses less digits than its factorization.

1203120045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170461 (or 170458 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1203120045 is about 34686.0208873834. The cubic root of 1203120045 is about 1063.5787561791.

Adding to 1203120045 its reverse (5400213021), we get a palindrome (6603333066).

The spelling of 1203120045 in words is "one billion, two hundred three million, one hundred twenty thousand, forty-five".