1256366 has 4 divisors (see below), whose sum is σ = 1884552. Its totient is φ = 628182.

The previous prime is 1256347. The next prime is 1256369. The reversal of 1256366 is 6636521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6636521 = 967 ⋅6863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314090 + ... + 314093.

It is an arithmetic number, because the mean of its divisors is an integer number (471138).

2^1256366 is an apocalyptic number.

1256366 is a deficient number, since it is larger than the sum of its proper divisors (628186).

1256366 is an equidigital number, since it uses as much as digits as its factorization.

1256366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628185.

The product of its digits is 6480, while the sum is 29.

The square root of 1256366 is about 1120.8773349479. The cubic root of 1256366 is about 107.9042933560.

The spelling of 1256366 in words is "one million, two hundred fifty-six thousand, three hundred sixty-six".