1251501005225 has 12 divisors (see below), whose sum is σ = 1559659550400. Its totient is φ = 996169640400.

The previous prime is 1251501005219. The next prime is 1251501005273. The reversal of 1251501005225 is 5225001051521.

It is not a de Polignac number, because 1251501005225 - 2⁸ = 1251501004969 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 125774021 + ... + 125783970.

It is an arithmetic number, because the mean of its divisors is an integer number (129971629200).

Almost surely, 2^{1251501005225} is an apocalyptic number.

It is an amenable number.

1251501005225 is a deficient number, since it is larger than the sum of its proper divisors (308158545175).

1251501005225 is a wasteful number, since it uses less digits than its factorization.

1251501005225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251558200 (or 251558195 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 29.

Adding to 1251501005225 its reverse (5225001051521), we get a palindrome (6476502056746).

The spelling of 1251501005225 in words is "one trillion, two hundred fifty-one billion, five hundred one million, five thousand, two hundred twenty-five".