1245403543252 has 48 divisors (see below), whose sum is σ = 2649943961280. Its totient is φ = 504751219200.

The previous prime is 1245403543213. The next prime is 1245403543253. The reversal of 1245403543252 is 2523453045421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245403543253) 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, 43800999 + ... + 43829422.

It is an arithmetic number, because the mean of its divisors is an integer number (55207165860).

Almost surely, 2^{1245403543252} is an apocalyptic number.

It is an amenable number.

1245403543252 is an abundant number, since it is smaller than the sum of its proper divisors (1404540418028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1245403543252 is a wasteful number, since it uses less digits than its factorization.

1245403543252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87630472 (or 87630470 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 40.

Adding to 1245403543252 its reverse (2523453045421), we get a palindrome (3768856588673).

The spelling of 1245403543252 in words is "one trillion, two hundred forty-five billion, four hundred three million, five hundred forty-three thousand, two hundred fifty-two".