125025001249 has 4 divisors (see below), whose sum is σ = 125189292420. Its totient is φ = 124860710080.

The previous prime is 125025001217. The next prime is 125025001259. The reversal of 125025001249 is 942100520521.

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 28588046400 + 96436954849 = 169080^2 + 310543^2 .

It is a cyclic number.

It is not a de Polignac number, because 125025001249 - 2⁵ = 125025001217 is a prime.

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 125025001249.

It is not an unprimeable number, because it can be changed into a prime (125025001259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82144444 + ... + 82145965.

It is an arithmetic number, because the mean of its divisors is an integer number (31297323105).

Almost surely, 2^125025001249 is an apocalyptic number.

It is an amenable number.

125025001249 is a deficient number, since it is larger than the sum of its proper divisors (164291171).

125025001249 is an equidigital number, since it uses as much as digits as its factorization.

125025001249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164291170.

The product of its (nonzero) digits is 7200, while the sum is 31.

The spelling of 125025001249 in words is "one hundred twenty-five billion, twenty-five million, one thousand, two hundred forty-nine".