1251167 has 4 divisors (see below), whose sum is σ = 1253616. Its totient is φ = 1248720.

The previous prime is 1251161. The next prime is 1251179. The reversal of 1251167 is 7611521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1251167 - 2²⁰ = 202591 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 (1251161) 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 3 ways as a sum of consecutive naturals, for example, 134 + ... + 1587.

It is an arithmetic number, because the mean of its divisors is an integer number (313404).

2^1251167 is an apocalyptic number.

1251167 is a deficient number, since it is larger than the sum of its proper divisors (2449).

1251167 is an equidigital number, since it uses as much as digits as its factorization.

1251167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2448.

The product of its digits is 420, while the sum is 23.

The square root of 1251167 is about 1118.5557652616. Note that the first 3 decimals coincide. The cubic root of 1251167 is about 107.7552470784.

Adding to 1251167 its reverse (7611521), we get a palindrome (8862688).

The spelling of 1251167 in words is "one million, two hundred fifty-one thousand, one hundred sixty-seven".