1261260203 has 8 divisors (see below), whose sum is σ = 1487938560. Its totient is φ = 1046206440.

The previous prime is 1261260197. The next prime is 1261260229. The reversal of 1261260203 is 3020621621.

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 1261260203 - 2¹² = 1261256107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1261200203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2905913 + ... + 2906346.

It is an arithmetic number, because the mean of its divisors is an integer number (185992320).

Almost surely, 2^1261260203 is an apocalyptic number.

1261260203 is a deficient number, since it is larger than the sum of its proper divisors (226678357).

1261260203 is an equidigital number, since it uses as much as digits as its factorization.

1261260203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5812297.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 1261260203 is about 35514.2253611141. The cubic root of 1261260203 is about 1080.4422637113.

Adding to 1261260203 its reverse (3020621621), we get a palindrome (4281881824).

The spelling of 1261260203 in words is "one billion, two hundred sixty-one million, two hundred sixty thousand, two hundred three".