1252454411545 has 4 divisors (see below), whose sum is σ = 1502945293860. Its totient is φ = 1001963529232.

The previous prime is 1252454411491. The next prime is 1252454411563. The reversal of 1252454411545 is 5451144542521.

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 400268798224 + 852185613321 = 632668^2 + 923139^2 .

It is a cyclic number.

It is not a de Polignac number, because 1252454411545 - 2²⁹ = 1251917540633 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, 125245441150 + ... + 125245441159.

It is an arithmetic number, because the mean of its divisors is an integer number (375736323465).

Almost surely, 2^{1252454411545} is an apocalyptic number.

It is an amenable number.

1252454411545 is a deficient number, since it is larger than the sum of its proper divisors (250490882315).

1252454411545 is an equidigital number, since it uses as much as digits as its factorization.

1252454411545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250490882314.

The product of its digits is 640000, while the sum is 43.

The spelling of 1252454411545 in words is "one trillion, two hundred fifty-two billion, four hundred fifty-four million, four hundred eleven thousand, five hundred forty-five".