125351435212405 has 4 divisors (see below), whose sum is σ = 150421722254892. Its totient is φ = 100281148169920.

The previous prime is 125351435212403. The next prime is 125351435212411. The reversal of 125351435212405 is 504212534153521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17329378402449 + 108022056809956 = 4162857^2 + 10393366^2 .

It is not a de Polignac number, because 125351435212405 - 2¹ = 125351435212403 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125351435212403) 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, 12535143521236 + ... + 12535143521245.

It is an arithmetic number, because the mean of its divisors is an integer number (37605430563723).

Almost surely, 2^{125351435212405} is an apocalyptic number.

It is an amenable number.

125351435212405 is a deficient number, since it is larger than the sum of its proper divisors (25070287042487).

125351435212405 is an equidigital number, since it uses as much as digits as its factorization.

125351435212405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25070287042486.

The product of its (nonzero) digits is 720000, while the sum is 43.

Adding to 125351435212405 its reverse (504212534153521), we get a palindrome (629563969365926).

The spelling of 125351435212405 in words is "one hundred twenty-five trillion, three hundred fifty-one billion, four hundred thirty-five million, two hundred twelve thousand, four hundred five".