1251434125 has 8 divisors (see below), whose sum is σ = 1561789944. Its totient is φ = 1001147200.

The previous prime is 1251434113. The next prime is 1251434131. The reversal of 1251434125 is 5214341521.

It can be written as a sum of positive squares in 4 ways, for example, as 62425801 + 1189008324 = 7901^2 + 34482^2 .

It is not a de Polignac number, because 1251434125 - 2¹⁹ = 1250909837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1251434093 and 1251434102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5005612 + ... + 5005861.

It is an arithmetic number, because the mean of its divisors is an integer number (195223743).

Almost surely, 2^1251434125 is an apocalyptic number.

It is an amenable number.

1251434125 is a deficient number, since it is larger than the sum of its proper divisors (310355819).

1251434125 is an equidigital number, since it uses as much as digits as its factorization.

1251434125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10011488 (or 10011478 counting only the distinct ones).

The product of its digits is 4800, while the sum is 28.

The square root of 1251434125 is about 35375.6148356463. The cubic root of 1251434125 is about 1077.6291513876.

Adding to 1251434125 its reverse (5214341521), we get a palindrome (6465775646).

The spelling of 1251434125 in words is "one billion, two hundred fifty-one million, four hundred thirty-four thousand, one hundred twenty-five".