1251430141 has 4 divisors (see below), whose sum is σ = 1347694012. Its totient is φ = 1155166272.

The previous prime is 1251430123. The next prime is 1251430151. The reversal of 1251430141 is 1410341521.

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

It can be written as a sum of positive squares in 2 ways, for example, as 341140900 + 910289241 = 18470^2 + 30171^2 .

It is not a de Polignac number, because 1251430141 - 2⁵ = 1251430109 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 (1251430151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48131916 + ... + 48131941.

It is an arithmetic number, because the mean of its divisors is an integer number (336923503).

Almost surely, 2^1251430141 is an apocalyptic number.

It is an amenable number.

1251430141 is a deficient number, since it is larger than the sum of its proper divisors (96263871).

1251430141 is an equidigital number, since it uses as much as digits as its factorization.

1251430141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96263870.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 1251430141 is about 35375.5585256261. The cubic root of 1251430141 is about 1077.6280078252.

Adding to 1251430141 its reverse (1410341521), we get a palindrome (2661771662).

The spelling of 1251430141 in words is "one billion, two hundred fifty-one million, four hundred thirty thousand, one hundred forty-one".