405542107129 has 2 divisors, whose sum is σ = 405542107130. Its totient is φ = 405542107128.

The previous prime is 405542107123. The next prime is 405542107147. The reversal of 405542107129 is 921701245504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 396299207529 + 9242899600 = 629523^2 + 96140^2 .

It is a cyclic number.

It is not a de Polignac number, because 405542107129 - 2⁵ = 405542107097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 405542107091 and 405542107100.

It is not a weakly prime, because it can be changed into another prime (405542107123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202771053564 + 202771053565.

It is an arithmetic number, because the mean of its divisors is an integer number (202771053565).

Almost surely, 2^405542107129 is an apocalyptic number.

It is an amenable number.

405542107129 is a deficient number, since it is larger than the sum of its proper divisors (1).

405542107129 is an equidigital number, since it uses as much as digits as its factorization.

405542107129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100800, while the sum is 40.

The spelling of 405542107129 in words is "four hundred five billion, five hundred forty-two million, one hundred seven thousand, one hundred twenty-nine".