135400125243 has 16 divisors (see below), whose sum is σ = 183715257600. Its totient is φ = 88677902880.

The previous prime is 135400125209. The next prime is 135400125247. The reversal of 135400125243 is 342521004531.

It is not a de Polignac number, because 135400125243 - 2⁸ = 135400124987 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 135400125243.

It is not an unprimeable number, because it can be changed into a prime (135400125247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14313 + ... + 520581.

It is an arithmetic number, because the mean of its divisors is an integer number (11482203600).

Almost surely, 2^135400125243 is an apocalyptic number.

135400125243 is a deficient number, since it is larger than the sum of its proper divisors (48315132357).

135400125243 is a wasteful number, since it uses less digits than its factorization.

135400125243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507842.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 135400125243 its reverse (342521004531), we get a palindrome (477921129774).

The spelling of 135400125243 in words is "one hundred thirty-five billion, four hundred million, one hundred twenty-five thousand, two hundred forty-three".