1272873281 has 8 divisors (see below), whose sum is σ = 1297969920. Its totient is φ = 1247816752.

The previous prime is 1272873253. The next prime is 1272873293. The reversal of 1272873281 is 1823782721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1272873281 is a prime.

It is a super-2 number, since 2×1272873281² = 3240412778967409922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1272873221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58640 + ... + 77358.

It is an arithmetic number, because the mean of its divisors is an integer number (162246240).

Almost surely, 2^1272873281 is an apocalyptic number.

It is an amenable number.

1272873281 is a deficient number, since it is larger than the sum of its proper divisors (25096639).

1272873281 is a wasteful number, since it uses less digits than its factorization.

1272873281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20055.

The product of its digits is 75264, while the sum is 41.

The square root of 1272873281 is about 35677.3496913658. The cubic root of 1272873281 is about 1083.7482023076.

The spelling of 1272873281 in words is "one billion, two hundred seventy-two million, eight hundred seventy-three thousand, two hundred eighty-one".