1251242325 has 18 divisors (see below), whose sum is σ = 2241114434. Its totient is φ = 667329120.

The previous prime is 1251242299. The next prime is 1251242327. The reversal of 1251242325 is 5232421521.

It can be written as a sum of positive squares in 3 ways, for example, as 175271121 + 1075971204 = 13239^2 + 32802^2 .

It is not a de Polignac number, because 1251242325 - 2¹³ = 1251234133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251242327) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2780314 + ... + 2780763.

Almost surely, 2^1251242325 is an apocalyptic number.

1251242325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1251242325 is a deficient number, since it is larger than the sum of its proper divisors (989872109).

1251242325 is a wasteful number, since it uses less digits than its factorization.

1251242325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5561093 (or 5561085 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 1251242325 is about 35372.9038248205. The cubic root of 1251242325 is about 1077.5740945992.

Adding to 1251242325 its reverse (5232421521), we get a palindrome (6483663846).

It can be divided in two parts, 125124 and 2325, that added together give a square (127449 = 357²).

The spelling of 1251242325 in words is "one billion, two hundred fifty-one million, two hundred forty-two thousand, three hundred twenty-five".