126405305041 has 4 divisors (see below), whose sum is σ = 126583592500. Its totient is φ = 126227017584.

The previous prime is 126405305017. The next prime is 126405305057. The reversal of 126405305041 is 140503504621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 140503504621 = 23 ⋅6108848027.

It can be written as a sum of positive squares in 2 ways, for example, as 9974216641 + 116431088400 = 99871^2 + 341220^2 .

It is a cyclic number.

It is not a de Polignac number, because 126405305041 - 2¹¹ = 126405302993 is a prime.

It is a super-2 number, since 2×126405305041² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 126405304994 and 126405305012.

It is not an unprimeable number, because it can be changed into a prime (126405305071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89142666 + ... + 89144083.

It is an arithmetic number, because the mean of its divisors is an integer number (31645898125).

Almost surely, 2^126405305041 is an apocalyptic number.

It is an amenable number.

126405305041 is a deficient number, since it is larger than the sum of its proper divisors (178287459).

126405305041 is an equidigital number, since it uses as much as digits as its factorization.

126405305041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178287458.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 126405305041 its reverse (140503504621), we get a palindrome (266908809662).

The spelling of 126405305041 in words is "one hundred twenty-six billion, four hundred five million, three hundred five thousand, forty-one".