1256071 has 4 divisors (see below), whose sum is σ = 1322200. Its totient is φ = 1189944.

The previous prime is 1256063. The next prime is 1256107. The reversal of 1256071 is 1706521.

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 1256071 - 2³ = 1256063 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 (1256041) 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, 33036 + ... + 33073.

It is an arithmetic number, because the mean of its divisors is an integer number (330550).

2^1256071 is an apocalyptic number.

1256071 is a deficient number, since it is larger than the sum of its proper divisors (66129).

1256071 is an equidigital number, since it uses as much as digits as its factorization.

1256071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66128.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 1256071 is about 1120.7457338754. The cubic root of 1256071 is about 107.8958472349.

The spelling of 1256071 in words is "one million, two hundred fifty-six thousand, seventy-one".