1667167 has 4 divisors (see below), whose sum is σ = 1682856. Its totient is φ = 1651480.

The previous prime is 1667147. The next prime is 1667179. The reversal of 1667167 is 7617661.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1667167 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1667147) 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, 7684 + ... + 7897.

It is an arithmetic number, because the mean of its divisors is an integer number (420714).

2^1667167 is an apocalyptic number.

1667167 is a deficient number, since it is larger than the sum of its proper divisors (15689).

1667167 is a wasteful number, since it uses less digits than its factorization.

1667167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15688.

The product of its digits is 10584, while the sum is 34.

The square root of 1667167 is about 1291.1882124617. The cubic root of 1667167 is about 118.5749731779.

The spelling of 1667167 in words is "one million, six hundred sixty-seven thousand, one hundred sixty-seven".