1261332803 has 8 divisors (see below), whose sum is σ = 1358596800. Its totient is φ = 1167156648.

The previous prime is 1261332773. The next prime is 1261332827. The reversal of 1261332803 is 3082331621.

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 1261332803 - 2²² = 1257138499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1261332883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 771113 + ... + 772746.

It is an arithmetic number, because the mean of its divisors is an integer number (169824600).

Almost surely, 2^1261332803 is an apocalyptic number.

1261332803 is a deficient number, since it is larger than the sum of its proper divisors (97263997).

1261332803 is a wasteful number, since it uses less digits than its factorization.

1261332803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1543921.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 1261332803 is about 35515.2474720366. The cubic root of 1261332803 is about 1080.4629939310.

The spelling of 1261332803 in words is "one billion, two hundred sixty-one million, three hundred thirty-two thousand, eight hundred three".