1273201281 has 32 divisors (see below), whose sum is σ = 2178748800. Its totient is φ = 726243840.

The previous prime is 1273201273. The next prime is 1273201291. The reversal of 1273201281 is 1821023721.

It is not a de Polignac number, because 1273201281 - 2³ = 1273201273 is a prime.

It is a super-2 number, since 2×1273201281² = 3242083003880081922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1273201291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 121036 + ... + 131133.

It is an arithmetic number, because the mean of its divisors is an integer number (68085900).

Almost surely, 2^1273201281 is an apocalyptic number.

1273201281 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1273201281 is a deficient number, since it is larger than the sum of its proper divisors (905547519).

1273201281 is a wasteful number, since it uses less digits than its factorization.

1273201281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252206 (or 252200 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 1273201281 is about 35681.9461492783. The cubic root of 1273201281 is about 1083.8412827651.

The spelling of 1273201281 in words is "one billion, two hundred seventy-three million, two hundred one thousand, two hundred eighty-one".