1272459481 has 4 divisors (see below), whose sum is σ = 1275010000. Its totient is φ = 1269908964.

The previous prime is 1272459443. The next prime is 1272459491. The reversal of 1272459481 is 1849542721.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1849542721 = 13 ⋅142272517.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1272459481 is a prime.

It is a super-2 number, since 2×1272459481² = 3238306261573578722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1272459421) 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, 1274511 + ... + 1275508.

It is an arithmetic number, because the mean of its divisors is an integer number (318752500).

Almost surely, 2^1272459481 is an apocalyptic number.

It is an amenable number.

1272459481 is a deficient number, since it is larger than the sum of its proper divisors (2550519).

1272459481 is an equidigital number, since it uses as much as digits as its factorization.

1272459481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2550518.

The product of its digits is 161280, while the sum is 43.

The square root of 1272459481 is about 35671.5500223918. The cubic root of 1272459481 is about 1083.6307505503.

The spelling of 1272459481 in words is "one billion, two hundred seventy-two million, four hundred fifty-nine thousand, four hundred eighty-one".