1271772043 has 4 divisors (see below), whose sum is σ = 1271853720. Its totient is φ = 1271690368.

The previous prime is 1271772001. The next prime is 1271772059. The reversal of 1271772043 is 3402771721.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3402771721 = 269 ⋅12649709.

It is a cyclic number.

It is not a de Polignac number, because 1271772043 - 2²¹ = 1269674891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1271772743) 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, 9430 + ... + 51307.

It is an arithmetic number, because the mean of its divisors is an integer number (317963430).

Almost surely, 2^1271772043 is an apocalyptic number.

1271772043 is a deficient number, since it is larger than the sum of its proper divisors (81677).

1271772043 is an equidigital number, since it uses as much as digits as its factorization.

1271772043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81676.

The product of its (nonzero) digits is 16464, while the sum is 34.

The square root of 1271772043 is about 35661.9130586120. The cubic root of 1271772043 is about 1083.4355738983.

The spelling of 1271772043 in words is "one billion, two hundred seventy-one million, seven hundred seventy-two thousand, forty-three".