1256340244 has 6 divisors (see below), whose sum is σ = 2198595434. Its totient is φ = 628170120.

The previous prime is 1256340229. The next prime is 1256340259. The reversal of 1256340244 is 4420436521.

It is an interprime number because it is at equal distance from previous prime (1256340229) and next prime (1256340259).

It can be written as a sum of positive squares in only one way, i.e., 1133130244 + 123210000 = 33662^2 + 11100^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157042527 + ... + 157042534.

Almost surely, 2^1256340244 is an apocalyptic number.

It is an amenable number.

1256340244 is a deficient number, since it is larger than the sum of its proper divisors (942255190).

1256340244 is a wasteful number, since it uses less digits than its factorization.

1256340244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314085065 (or 314085063 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 1256340244 is about 35444.8902382276. The cubic root of 1256340244 is about 1079.0355599075.

Adding to 1256340244 its reverse (4420436521), we get a palindrome (5676776765).

The spelling of 1256340244 in words is "one billion, two hundred fifty-six million, three hundred forty thousand, two hundred forty-four".