1243503045 has 12 divisors (see below), whose sum is σ = 2155405356. Its totient is φ = 663201600.

The previous prime is 1243502983. The next prime is 1243503061. The reversal of 1243503045 is 5403053421.

1243503045 is a `hidden beast` number, since 1 + 2 + 4 + 350 + 304 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 378613764 + 864889281 = 19458^2 + 29409^2 .

It is not a de Polignac number, because 1243503045 - 2⁷ = 1243502917 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13816656 + ... + 13816745.

It is an arithmetic number, because the mean of its divisors is an integer number (179617113).

Almost surely, 2^1243503045 is an apocalyptic number.

1243503045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1243503045 is a deficient number, since it is larger than the sum of its proper divisors (911902311).

1243503045 is a wasteful number, since it uses less digits than its factorization.

1243503045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27633412 (or 27633409 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 1243503045 is about 35263.3385401893. The cubic root of 1243503045 is about 1075.3478002079.

Adding to 1243503045 its reverse (5403053421), we get a palindrome (6646556466).

The spelling of 1243503045 in words is "one billion, two hundred forty-three million, five hundred three thousand, forty-five".