1256167 has 4 divisors (see below), whose sum is σ = 1370376. Its totient is φ = 1141960.

The previous prime is 1256161. The next prime is 1256197. The reversal of 1256167 is 7616521.

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 1256167 - 2¹¹ = 1254119 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256161) 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, 57088 + ... + 57109.

It is an arithmetic number, because the mean of its divisors is an integer number (342594).

2^1256167 is an apocalyptic number.

1256167 is a deficient number, since it is larger than the sum of its proper divisors (114209).

1256167 is a wasteful number, since it uses less digits than its factorization.

1256167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114208.

The product of its digits is 2520, while the sum is 28.

The square root of 1256167 is about 1120.7885616832. The cubic root of 1256167 is about 107.8985959483.

The spelling of 1256167 in words is "one million, two hundred fifty-six thousand, one hundred sixty-seven".