1271972473 has 4 divisors (see below), whose sum is σ = 1327275648. Its totient is φ = 1216669300.

The previous prime is 1271972431. The next prime is 1271972477. The reversal of 1271972473 is 3742791721.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1271972473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1271972477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27651553 + ... + 27651598.

It is an arithmetic number, because the mean of its divisors is an integer number (331818912).

Almost surely, 2^1271972473 is an apocalyptic number.

It is an amenable number.

1271972473 is a deficient number, since it is larger than the sum of its proper divisors (55303175).

1271972473 is an equidigital number, since it uses as much as digits as its factorization.

1271972473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55303174.

The product of its digits is 148176, while the sum is 43.

The square root of 1271972473 is about 35664.7230887890. The cubic root of 1271972473 is about 1083.4924870290.

The spelling of 1271972473 in words is "one billion, two hundred seventy-one million, nine hundred seventy-two thousand, four hundred seventy-three".