1252103472181 has 4 divisors (see below), whose sum is σ = 1264500536364. Its totient is φ = 1239706408000.

The previous prime is 1252103472161. The next prime is 1252103472227. The reversal of 1252103472181 is 1812743012521.

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 968238288081 + 283865184100 = 983991^2 + 532790^2 .

It is a cyclic number.

It is not a de Polignac number, because 1252103472181 - 2¹⁵ = 1252103439413 is a prime.

It is a super-2 number, since 2×1252103472181² (a number of 25 digits) contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1252103472181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252103472161) 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, 6198531940 + ... + 6198532141.

It is an arithmetic number, because the mean of its divisors is an integer number (316125134091).

Almost surely, 2^{1252103472181} is an apocalyptic number.

It is an amenable number.

1252103472181 is a deficient number, since it is larger than the sum of its proper divisors (12397064183).

1252103472181 is a wasteful number, since it uses less digits than its factorization.

1252103472181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12397064182.

The product of its (nonzero) digits is 26880, while the sum is 37.

The spelling of 1252103472181 in words is "one trillion, two hundred fifty-two billion, one hundred three million, four hundred seventy-two thousand, one hundred eighty-one".