1253305252405 has 4 divisors (see below), whose sum is σ = 1503966302892. Its totient is φ = 1002644201920.

The previous prime is 1253305252393. The next prime is 1253305252427. The reversal of 1253305252405 is 5042525033521.

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 501170548356 + 752134704049 = 707934^2 + 867257^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1253305252405 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 3 ways as a sum of consecutive naturals, for example, 125330525236 + ... + 125330525245.

It is an arithmetic number, because the mean of its divisors is an integer number (375991575723).

Almost surely, 2^{1253305252405} is an apocalyptic number.

It is an amenable number.

1253305252405 is a deficient number, since it is larger than the sum of its proper divisors (250661050487).

1253305252405 is an equidigital number, since it uses as much as digits as its factorization.

1253305252405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250661050486.

The product of its (nonzero) digits is 180000, while the sum is 37.

It can be divided in two parts, 125330 and 5252405, that added together give a palindrome (5377735).

The spelling of 1253305252405 in words is "one trillion, two hundred fifty-three billion, three hundred five million, two hundred fifty-two thousand, four hundred five".