1251345241 has 4 divisors (see below), whose sum is σ = 1251478800. Its totient is φ = 1251211684.

The previous prime is 1251345239. The next prime is 1251345269. The reversal of 1251345241 is 1425431521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1251345241 - 2¹ = 1251345239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1251345281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51571 + ... + 71848.

It is an arithmetic number, because the mean of its divisors is an integer number (312869700).

Almost surely, 2^1251345241 is an apocalyptic number.

It is an amenable number.

1251345241 is a deficient number, since it is larger than the sum of its proper divisors (133559).

1251345241 is a wasteful number, since it uses less digits than its factorization.

1251345241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133558.

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

The square root of 1251345241 is about 35374.3585242192. The cubic root of 1251345241 is about 1077.6036376575.

Adding to 1251345241 its reverse (1425431521), we get a palindrome (2676776762).

The spelling of 1251345241 in words is "one billion, two hundred fifty-one million, three hundred forty-five thousand, two hundred forty-one".