1256261222 has 8 divisors (see below), whose sum is σ = 1935321456. Its totient is φ = 611154072.

The previous prime is 1256261183. The next prime is 1256261231. The reversal of 1256261222 is 2221626521.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8488178 + ... + 8488325.

It is an arithmetic number, because the mean of its divisors is an integer number (241915182).

Almost surely, 2^1256261222 is an apocalyptic number.

1256261222 is a deficient number, since it is larger than the sum of its proper divisors (679060234).

1256261222 is a wasteful number, since it uses less digits than its factorization.

1256261222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16976542.

The product of its digits is 5760, while the sum is 29.

The square root of 1256261222 is about 35443.7755043110. The cubic root of 1256261222 is about 1079.0129361699.

Adding to 1256261222 its reverse (2221626521), we get a palindrome (3477887743).

The spelling of 1256261222 in words is "one billion, two hundred fifty-six million, two hundred sixty-one thousand, two hundred twenty-two".