1272465571 has 4 divisors (see below), whose sum is σ = 1370347552. Its totient is φ = 1174583592.

The previous prime is 1272465559. The next prime is 1272465577. The reversal of 1272465571 is 1755642721.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1272465571 - 2⁷ = 1272465443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1272465577) 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, 48940971 + ... + 48940996.

It is an arithmetic number, because the mean of its divisors is an integer number (342586888).

Almost surely, 2^1272465571 is an apocalyptic number.

1272465571 is a deficient number, since it is larger than the sum of its proper divisors (97881981).

1272465571 is an equidigital number, since it uses as much as digits as its factorization.

1272465571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97881980.

The product of its digits is 117600, while the sum is 40.

The square root of 1272465571 is about 35671.6353844339. The cubic root of 1272465571 is about 1083.6324793023.

The spelling of 1272465571 in words is "one billion, two hundred seventy-two million, four hundred sixty-five thousand, five hundred seventy-one".