1256342411 has 2 divisors, whose sum is σ = 1256342412. Its totient is φ = 1256342410.

The previous prime is 1256342407. The next prime is 1256342429. The reversal of 1256342411 is 1142436521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1256342411 - 2² = 1256342407 is a prime.

It is not a weakly prime, because it can be changed into another prime (1256342441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 628171205 + 628171206.

It is an arithmetic number, because the mean of its divisors is an integer number (628171206).

Almost surely, 2^1256342411 is an apocalyptic number.

1256342411 is a deficient number, since it is larger than the sum of its proper divisors (1).

1256342411 is an equidigital number, since it uses as much as digits as its factorization.

1256342411 is an evil number, because the sum of its binary digits is even.

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

The square root of 1256342411 is about 35444.9208067954. The cubic root of 1256342411 is about 1079.0361802991.

Adding to 1256342411 its reverse (1142436521), we get a palindrome (2398778932).

The spelling of 1256342411 in words is "one billion, two hundred fifty-six million, three hundred forty-two thousand, four hundred eleven".