1251052415 has 4 divisors (see below), whose sum is σ = 1501262904. Its totient is φ = 1000841928.

The previous prime is 1251052379. The next prime is 1251052417. The reversal of 1251052415 is 5142501521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1251052415 - 2⁶ = 1251052351 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 (1251052417) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 125105237 + ... + 125105246.

It is an arithmetic number, because the mean of its divisors is an integer number (375315726).

Almost surely, 2^1251052415 is an apocalyptic number.

1251052415 is a deficient number, since it is larger than the sum of its proper divisors (250210489).

1251052415 is an equidigital number, since it uses as much as digits as its factorization.

1251052415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250210488.

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 1251052415 is about 35370.2193236061. The cubic root of 1251052415 is about 1077.5195747974.

Adding to 1251052415 its reverse (5142501521), we get a palindrome (6393553936).

The spelling of 1251052415 in words is "one billion, two hundred fifty-one million, fifty-two thousand, four hundred fifteen".