1256261 has 8 divisors (see below), whose sum is σ = 1358880. Its totient is φ = 1157328.

The previous prime is 1256243. The next prime is 1256267. The reversal of 1256261 is 1626521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1256261 - 2⁶ = 1256197 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191 + ... + 1596.

It is an arithmetic number, because the mean of its divisors is an integer number (169860).

2^1256261 is an apocalyptic number.

It is an amenable number.

1256261 is a deficient number, since it is larger than the sum of its proper divisors (102619).

1256261 is a wasteful number, since it uses less digits than its factorization.

1256261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1843.

The product of its digits is 720, while the sum is 23.

The square root of 1256261 is about 1120.8304956594. The cubic root of 1256261 is about 107.9012872611.

The spelling of 1256261 in words is "one million, two hundred fifty-six thousand, two hundred sixty-one".