1256225444 has 6 divisors (see below), whose sum is σ = 2198394534. Its totient is φ = 628112720.

The previous prime is 1256225423. The next prime is 1256225459. The reversal of 1256225444 is 4445226521.

It can be written as a sum of positive squares in only one way, i.e., 1149888100 + 106337344 = 33910^2 + 10312^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157028177 + ... + 157028184.

It is an arithmetic number, because the mean of its divisors is an integer number (366399089).

Almost surely, 2^1256225444 is an apocalyptic number.

It is an amenable number.

1256225444 is a deficient number, since it is larger than the sum of its proper divisors (942169090).

1256225444 is a wasteful number, since it uses less digits than its factorization.

1256225444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314056365 (or 314056363 counting only the distinct ones).

The product of its digits is 76800, while the sum is 35.

The square root of 1256225444 is about 35443.2707858629. The cubic root of 1256225444 is about 1079.0026927347.

The spelling of 1256225444 in words is "one billion, two hundred fifty-six million, two hundred twenty-five thousand, four hundred forty-four".