1256422 has 8 divisors (see below), whose sum is σ = 1889496. Its totient is φ = 626592.

The previous prime is 1256407. The next prime is 1256429. The reversal of 1256422 is 2246521.

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

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1256393 and 1256402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256429) 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, 798 + ... + 1774.

It is an arithmetic number, because the mean of its divisors is an integer number (236187).

2^1256422 is an apocalyptic number.

1256422 is a deficient number, since it is larger than the sum of its proper divisors (633074).

1256422 is an equidigital number, since it uses as much as digits as its factorization.

1256422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1622.

The product of its digits is 960, while the sum is 22.

The square root of 1256422 is about 1120.9023151015. The cubic root of 1256422 is about 107.9058965382.

Subtracting 1256422 from its reverse (2246521), we obtain a palindrome (990099).

The spelling of 1256422 in words is "one million, two hundred fifty-six thousand, four hundred twenty-two".