1231453005405 has 16 divisors (see below), whose sum is σ = 2251799781504. Its totient is φ = 562949945280.

The previous prime is 1231453005403. The next prime is 1231453005421. The reversal of 1231453005405 is 5045003541321.

It is not a de Polignac number, because 1231453005405 - 2¹ = 1231453005403 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231453005403) 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, 5864061826 + ... + 5864062035.

It is an arithmetic number, because the mean of its divisors is an integer number (140737486344).

Almost surely, 2^{1231453005405} is an apocalyptic number.

1231453005405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1231453005405 is a deficient number, since it is larger than the sum of its proper divisors (1020346776099).

1231453005405 is a wasteful number, since it uses less digits than its factorization.

1231453005405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11728123876.

The product of its (nonzero) digits is 36000, while the sum is 33.

Adding to 1231453005405 its reverse (5045003541321), we get a palindrome (6276456546726).

The spelling of 1231453005405 in words is "one trillion, two hundred thirty-one billion, four hundred fifty-three million, five thousand, four hundred five".