1271322403 has 8 divisors (see below), whose sum is σ = 1377317088. Its totient is φ = 1166499264.

The previous prime is 1271322389. The next prime is 1271322419. The reversal of 1271322403 is 3042231721.

It is a happy number.

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 1271322403 - 2¹³ = 1271314211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1271322463) 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, 290626 + ... + 294967.

It is an arithmetic number, because the mean of its divisors is an integer number (172164636).

Almost surely, 2^1271322403 is an apocalyptic number.

1271322403 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1271322403 is a deficient number, since it is larger than the sum of its proper divisors (105994685).

1271322403 is a wasteful number, since it uses less digits than its factorization.

1271322403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585773.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 1271322403 is about 35655.6082965920. The cubic root of 1271322403 is about 1083.3078745470.

The spelling of 1271322403 in words is "one billion, two hundred seventy-one million, three hundred twenty-two thousand, four hundred three".