1252021242245 has 32 divisors (see below), whose sum is σ = 1635594854400. Its totient is φ = 916954848576.

The previous prime is 1252021242203. The next prime is 1252021242247. The reversal of 1252021242245 is 5422421202521.

It is a de Polignac number, because none of the positive numbers 2^k-1252021242245 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252021242247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1421999 + ... + 2127468.

It is an arithmetic number, because the mean of its divisors is an integer number (51112339200).

Almost surely, 2^{1252021242245} is an apocalyptic number.

It is an amenable number.

1252021242245 is a deficient number, since it is larger than the sum of its proper divisors (383573612155).

1252021242245 is a wasteful number, since it uses less digits than its factorization.

1252021242245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3549617.

The product of its (nonzero) digits is 25600, while the sum is 32.

Adding to 1252021242245 its reverse (5422421202521), we get a palindrome (6674442444766).

The spelling of 1252021242245 in words is "one trillion, two hundred fifty-two billion, twenty-one million, two hundred forty-two thousand, two hundred forty-five".