1256601 has 4 divisors (see below), whose sum is σ = 1675472. Its totient is φ = 837732.

The previous prime is 1256597. The next prime is 1256611. The reversal of 1256601 is 1066521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1066521 = 3 ⋅355507.

It is not a de Polignac number, because 1256601 - 2² = 1256597 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1256611) 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, 209431 + ... + 209436.

It is an arithmetic number, because the mean of its divisors is an integer number (418868).

2^1256601 is an apocalyptic number.

It is an amenable number.

1256601 is a deficient number, since it is larger than the sum of its proper divisors (418871).

1256601 is an equidigital number, since it uses as much as digits as its factorization.

1256601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418870.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1256601 is about 1120.9821586448. The cubic root of 1256601 is about 107.9110206759.

The spelling of 1256601 in words is "one million, two hundred fifty-six thousand, six hundred one".