1255120102025 has 12 divisors (see below), whose sum is σ = 1556363108112. Its totient is φ = 1004086932240.

The previous prime is 1255120102021. The next prime is 1255120102123. The reversal of 1255120102025 is 5202010215521.

It is a happy number.

It is not a de Polignac number, because 1255120102025 - 2² = 1255120102021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1255120101985 and 1255120102003.

It is not an unprimeable number, because it can be changed into a prime (1255120102021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4431314 + ... + 4706036.

It is an arithmetic number, because the mean of its divisors is an integer number (129696925676).

Almost surely, 2^{1255120102025} is an apocalyptic number.

It is an amenable number.

1255120102025 is a deficient number, since it is larger than the sum of its proper divisors (301243006087).

1255120102025 is a wasteful number, since it uses less digits than its factorization.

1255120102025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457480 (or 457475 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 26.

Adding to 1255120102025 its reverse (5202010215521), we get a palindrome (6457130317546).

The spelling of 1255120102025 in words is "one trillion, two hundred fifty-five billion, one hundred twenty million, one hundred two thousand, twenty-five".