1256122338 has 32 divisors (see below), whose sum is σ = 2655590400. Its totient is φ = 395001936.

The previous prime is 1256122337. The next prime is 1256122349. The reversal of 1256122338 is 8332216521.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1256122299 and 1256122308.

It is not an unprimeable number, because it can be changed into a prime (1256122337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4195 + ... + 50297.

It is an arithmetic number, because the mean of its divisors is an integer number (82987200).

Almost surely, 2^1256122338 is an apocalyptic number.

1256122338 is an abundant number, since it is smaller than the sum of its proper divisors (1399468062).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1256122338 is a wasteful number, since it uses less digits than its factorization.

1256122338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46366.

The product of its digits is 17280, while the sum is 33.

The square root of 1256122338 is about 35441.8162344990. The cubic root of 1256122338 is about 1078.9731718405.

Adding to 1256122338 its reverse (8332216521), we get a palindrome (9588338859).

The spelling of 1256122338 in words is "one billion, two hundred fifty-six million, one hundred twenty-two thousand, three hundred thirty-eight".