126401311 has 2 divisors, whose sum is σ = 126401312. Its totient is φ = 126401310.

The previous prime is 126401293. The next prime is 126401321. The reversal of 126401311 is 113104621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 126401311 - 2⁵ = 126401279 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126401321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63200655 + 63200656.

It is an arithmetic number, because the mean of its divisors is an integer number (63200656).

Almost surely, 2^126401311 is an apocalyptic number.

126401311 is a deficient number, since it is larger than the sum of its proper divisors (1).

126401311 is an equidigital number, since it uses as much as digits as its factorization.

126401311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 126401311 is about 11242.8337620015. The cubic root of 126401311 is about 501.8614758815.

Adding to 126401311 its reverse (113104621), we get a palindrome (239505932).

The spelling of 126401311 in words is "one hundred twenty-six million, four hundred one thousand, three hundred eleven".