1205243410525 has 48 divisors (see below), whose sum is σ = 1869228897408. Its totient is φ = 748919808000.

The previous prime is 1205243410523. The next prime is 1205243410529. The reversal of 1205243410525 is 5250143425021.

It is a happy number.

It is not a de Polignac number, because 1205243410525 - 2¹ = 1205243410523 is a prime.

It is a super-2 number, since 2×1205243410525² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205243410523) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 397636 + ... + 1602685.

It is an arithmetic number, because the mean of its divisors is an integer number (38942268696).

Almost surely, 2^{1205243410525} is an apocalyptic number.

It is an amenable number.

1205243410525 is a deficient number, since it is larger than the sum of its proper divisors (663985486883).

1205243410525 is a wasteful number, since it uses less digits than its factorization.

1205243410525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2000662 (or 2000657 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 34.

Adding to 1205243410525 its reverse (5250143425021), we get a palindrome (6455386835546).

The spelling of 1205243410525 in words is "one trillion, two hundred five billion, two hundred forty-three million, four hundred ten thousand, five hundred twenty-five".