1255250440405 has 32 divisors (see below), whose sum is σ = 1678447411200. Its totient is φ = 894808518912.

The previous prime is 1255250440343. The next prime is 1255250440439. The reversal of 1255250440405 is 5040440525521.

It is a cyclic number.

It is not a de Polignac number, because 1255250440405 - 2¹⁷ = 1255250309333 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9584272 + ... + 9714358.

It is an arithmetic number, because the mean of its divisors is an integer number (52451481600).

Almost surely, 2^{1255250440405} is an apocalyptic number.

It is an amenable number.

1255250440405 is a deficient number, since it is larger than the sum of its proper divisors (423196970795).

1255250440405 is a wasteful number, since it uses less digits than its factorization.

1255250440405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135253.

The product of its (nonzero) digits is 160000, while the sum is 37.

Adding to 1255250440405 its reverse (5040440525521), we get a palindrome (6295690965926).

The spelling of 1255250440405 in words is "one trillion, two hundred fifty-five billion, two hundred fifty million, four hundred forty thousand, four hundred five".