1256262541 has 2 divisors, whose sum is σ = 1256262542. Its totient is φ = 1256262540.

The previous prime is 1256262533. The next prime is 1256262559. The reversal of 1256262541 is 1452626521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 946854441 + 309408100 = 30771^2 + 17590^2 .

It is an emirp because it is prime and its reverse (1452626521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1256262541 - 2³ = 1256262533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1256262497 and 1256262506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1256262521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 628131270 + 628131271.

It is an arithmetic number, because the mean of its divisors is an integer number (628131271).

Almost surely, 2^1256262541 is an apocalyptic number.

It is an amenable number.

1256262541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1256262541 is an equidigital number, since it uses as much as digits as its factorization.

1256262541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28800, while the sum is 34.

The square root of 1256262541 is about 35443.7941112404. The cubic root of 1256262541 is about 1079.0133138031.

The spelling of 1256262541 in words is "one billion, two hundred fifty-six million, two hundred sixty-two thousand, five hundred forty-one".