1252310342545 has 4 divisors (see below), whose sum is σ = 1502772411060. Its totient is φ = 1001848274032.

The previous prime is 1252310342533. The next prime is 1252310342639. The reversal of 1252310342545 is 5452430132521.

It is a happy number.

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 257567415121 + 994742927424 = 507511^2 + 997368^2 .

It is a cyclic number.

It is not a de Polignac number, because 1252310342545 - 2¹¹ = 1252310340497 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125231034250 + ... + 125231034259.

It is an arithmetic number, because the mean of its divisors is an integer number (375693102765).

Almost surely, 2^{1252310342545} is an apocalyptic number.

It is an amenable number.

1252310342545 is a deficient number, since it is larger than the sum of its proper divisors (250462068515).

1252310342545 is an equidigital number, since it uses as much as digits as its factorization.

1252310342545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250462068514.

The product of its (nonzero) digits is 144000, while the sum is 37.

The spelling of 1252310342545 in words is "one trillion, two hundred fifty-two billion, three hundred ten million, three hundred forty-two thousand, five hundred forty-five".