1256051222 has 12 divisors (see below), whose sum is σ = 2001425100. Its totient is φ = 591082656.

The previous prime is 1256051207. The next prime is 1256051227. The reversal of 1256051222 is 2221506521.

It is a junction number, because it is equal to n+sod(n) for n = 1256051191 and 1256051200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256051227) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1085972 + ... + 1087127.

It is an arithmetic number, because the mean of its divisors is an integer number (166785425).

Almost surely, 2^1256051222 is an apocalyptic number.

1256051222 is a deficient number, since it is larger than the sum of its proper divisors (745373878).

1256051222 is a wasteful number, since it uses less digits than its factorization.

1256051222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2173135 (or 2173118 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 1256051222 is about 35440.8129421434. The cubic root of 1256051222 is about 1078.9528092527.

Adding to 1256051222 its reverse (2221506521), we get a palindrome (3477557743).

The spelling of 1256051222 in words is "one billion, two hundred fifty-six million, fifty-one thousand, two hundred twenty-two".