1287167 has 4 divisors (see below), whose sum is σ = 1471056. Its totient is φ = 1103280.

The previous prime is 1287163. The next prime is 1287173. The reversal of 1287167 is 7617821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7617821 = 541 ⋅14081.

It is a cyclic number.

It is not a de Polignac number, because 1287167 - 2² = 1287163 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 (1287163) 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, 91934 + ... + 91947.

It is an arithmetic number, because the mean of its divisors is an integer number (367764).

2^1287167 is an apocalyptic number.

1287167 is a deficient number, since it is larger than the sum of its proper divisors (183889).

1287167 is an equidigital number, since it uses as much as digits as its factorization.

1287167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183888.

The product of its digits is 4704, while the sum is 32.

The square root of 1287167 is about 1134.5338249695. The cubic root of 1287167 is about 108.7789758522.

The spelling of 1287167 in words is "one million, two hundred eighty-seven thousand, one hundred sixty-seven".