1255534420135 has 12 divisors (see below), whose sum is σ = 1544284940184. Its totient is φ = 979929296960.

The previous prime is 1255534420123. The next prime is 1255534420157. The reversal of 1255534420135 is 5310244355521.

It is not a de Polignac number, because 1255534420135 - 2¹⁷ = 1255534289063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74681329 + ... + 74698138.

It is an arithmetic number, because the mean of its divisors is an integer number (128690411682).

Almost surely, 2^{1255534420135} is an apocalyptic number.

1255534420135 is a deficient number, since it is larger than the sum of its proper divisors (288750520049).

1255534420135 is an equidigital number, since it uses as much as digits as its factorization.

1255534420135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149379554 (or 149379513 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 40.

Adding to 1255534420135 its reverse (5310244355521), we get a palindrome (6565778775656).

The spelling of 1255534420135 in words is "one trillion, two hundred fifty-five billion, five hundred thirty-four million, four hundred twenty thousand, one hundred thirty-five".