1273847481 has 9 divisors (see below), whose sum is σ = 1840156591. Its totient is φ = 849160272.

The previous prime is 1273847467. The next prime is 1273847503. The reversal of 1273847481 is 1847483721.

The square root of 1273847481 is 35691.

It is a perfect power (a square), and thus also a powerful number.

1273847481 is a `hidden beast` number, since 127 + 3 + 8 + 47 + 481 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1267004025 + 6843456 = 35595^2 + 2616^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 1273847481 - 2¹⁵ = 1273814713 is a prime.

It is a super-2 number, since 2×1273847481² = 3245374809700090722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1273847401) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 101125 + ... + 113021.

Almost surely, 2^1273847481 is an apocalyptic number.

1273847481 is the 35691-st square number.

1273847481 is the 17846-th centered octagonal number.

It is an amenable number.

1273847481 is a deficient number, since it is larger than the sum of its proper divisors (566309110).

1273847481 is an frugal number, since it uses more digits than its factorization.

1273847481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23800 (or 11900 counting only the distinct ones).

The product of its digits is 301056, while the sum is 45.

The cubic root of 1273847481 is about 1084.0246158565.

The spelling of 1273847481 in words is "one billion, two hundred seventy-three million, eight hundred forty-seven thousand, four hundred eighty-one".