1225500450871 has 4 divisors (see below), whose sum is σ = 1225507050000. Its totient is φ = 1225493851744.

The previous prime is 1225500450847. The next prime is 1225500450883. The reversal of 1225500450871 is 1780540055221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1225500450871 - 2¹⁹ = 1225499926583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225500450271) by changing a digit.

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, 3012691 + ... + 3395188.

It is an arithmetic number, because the mean of its divisors is an integer number (306376762500).

Almost surely, 2^{1225500450871} is an apocalyptic number.

1225500450871 is a deficient number, since it is larger than the sum of its proper divisors (6599129).

1225500450871 is an equidigital number, since it uses as much as digits as its factorization.

1225500450871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6599128.

The product of its (nonzero) digits is 112000, while the sum is 40.

The spelling of 1225500450871 in words is "one trillion, two hundred twenty-five billion, five hundred million, four hundred fifty thousand, eight hundred seventy-one".