1207181243525 has 12 divisors (see below), whose sum is σ = 1496927240004. Its totient is φ = 965730480000.

The previous prime is 1207181243519. The next prime is 1207181243539. The reversal of 1207181243525 is 5253421817021.

It is a happy number.

It is a Cunningham number, because it is equal to 1098718²+1.

It can be written as a sum of positive squares in 6 ways, for example, as 94643600164 + 1112537643361 = 307642^2 + 1054769^2 .

It is not a de Polignac number, because 1207181243525 - 2¹⁸ = 1207180981381 is a prime.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 1526705 + ... + 2178345.

It is an arithmetic number, because the mean of its divisors is an integer number (124743936667).

Almost surely, 2^{1207181243525} is an apocalyptic number.

It is an amenable number.

1207181243525 is a deficient number, since it is larger than the sum of its proper divisors (289745996479).

1207181243525 is an equidigital number, since it uses as much as digits as its factorization.

1207181243525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725752 (or 725747 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 41.

The spelling of 1207181243525 in words is "one trillion, two hundred seven billion, one hundred eighty-one million, two hundred forty-three thousand, five hundred twenty-five".