1257167 has 4 divisors (see below), whose sum is σ = 1331136. Its totient is φ = 1183200.

The previous prime is 1257163. The next prime is 1257199. The reversal of 1257167 is 7617521.

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

It is not a de Polignac number, because 1257167 - 2² = 1257163 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 (1257163) 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, 36959 + ... + 36992.

It is an arithmetic number, because the mean of its divisors is an integer number (332784).

2^1257167 is an apocalyptic number.

1257167 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1257167 is a deficient number, since it is larger than the sum of its proper divisors (73969).

1257167 is an equidigital number, since it uses as much as digits as its factorization.

1257167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73968.

The product of its digits is 2940, while the sum is 29.

The square root of 1257167 is about 1121.2345874080. The cubic root of 1257167 is about 107.9272200555.

The spelling of 1257167 in words is "one million, two hundred fifty-seven thousand, one hundred sixty-seven".