1215722874725 has 6 divisors (see below), whose sum is σ = 1507496364690. Its totient is φ = 972578299760.

The previous prime is 1215722874719. The next prime is 1215722874749. The reversal of 1215722874725 is 5274782275121.

It can be written as a sum of positive squares in 3 ways, for example, as 8644908484 + 1207077966241 = 92978^2 + 1098671^2 .

It is not a de Polignac number, because 1215722874725 - 2⁸ = 1215722874469 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24314457470 + ... + 24314457519.

It is an arithmetic number, because the mean of its divisors is an integer number (251249394115).

Almost surely, 2^{1215722874725} is an apocalyptic number.

It is an amenable number.

1215722874725 is a deficient number, since it is larger than the sum of its proper divisors (291773489965).

1215722874725 is an equidigital number, since it uses as much as digits as its factorization.

1215722874725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48628914999 (or 48628914994 counting only the distinct ones).

The product of its digits is 4390400, while the sum is 53.

The spelling of 1215722874725 in words is "one trillion, two hundred fifteen billion, seven hundred twenty-two million, eight hundred seventy-four thousand, seven hundred twenty-five".