1273887 has 10 divisors (see below), whose sum is σ = 1903088. Its totient is φ = 849204.

The previous prime is 1273879. The next prime is 1273889. The reversal of 1273887 is 7883721.

It is not a de Polignac number, because 1273887 - 2³ = 1273879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1273889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 7783 + ... + 7944.

2^1273887 is an apocalyptic number.

1273887 is a deficient number, since it is larger than the sum of its proper divisors (629201).

1273887 is an equidigital number, since it uses as much as digits as its factorization.

1273887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15739 (or 15730 counting only the distinct ones).

The product of its digits is 18816, while the sum is 36.

The square root of 1273887 is about 1128.6660267767. Note that the first 3 decimals coincide. The cubic root of 1273887 is about 108.4035825761.

The spelling of 1273887 in words is "one million, two hundred seventy-three thousand, eight hundred eighty-seven".