1251424045 has 16 divisors (see below), whose sum is σ = 1518923952. Its totient is φ = 989729280.

The previous prime is 1251424039. The next prime is 1251424067. The reversal of 1251424045 is 5404241521.

It can be written as a sum of positive squares in 8 ways, for example, as 201469636 + 1049954409 = 14194^2 + 32403^2 .

It is not a de Polignac number, because 1251424045 - 2²⁷ = 1117206317 is a prime.

It is a Duffinian number.

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 15 ways as a sum of consecutive naturals, for example, 152569 + ... + 160561.

It is an arithmetic number, because the mean of its divisors is an integer number (94932747).

Almost surely, 2^1251424045 is an apocalyptic number.

It is an amenable number.

1251424045 is a deficient number, since it is larger than the sum of its proper divisors (267499907).

1251424045 is a wasteful number, since it uses less digits than its factorization.

1251424045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8352.

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 1251424045 is about 35375.4723643374. The cubic root of 1251424045 is about 1077.6262580322.

Adding to 1251424045 its reverse (5404241521), we get a palindrome (6655665566).

The spelling of 1251424045 in words is "one billion, two hundred fifty-one million, four hundred twenty-four thousand, forty-five".