1251441229 has 2 divisors, whose sum is σ = 1251441230. Its totient is φ = 1251441228.

The previous prime is 1251441221. The next prime is 1251441241. The reversal of 1251441229 is 9221441521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 665898025 + 585543204 = 25805^2 + 24198^2 .

It is a cyclic number.

It is not a de Polignac number, because 1251441229 - 2³ = 1251441221 is a prime.

It is a super-2 number, since 2×1251441229² = 3132210299282060882, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1251441229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1251441221) 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 as a sum of consecutive naturals, namely, 625720614 + 625720615.

It is an arithmetic number, because the mean of its divisors is an integer number (625720615).

Almost surely, 2^1251441229 is an apocalyptic number.

It is an amenable number.

1251441229 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251441229 is an equidigital number, since it uses as much as digits as its factorization.

1251441229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 31.

The square root of 1251441229 is about 35375.7152436527. The cubic root of 1251441229 is about 1077.6311905049.

The spelling of 1251441229 in words is "one billion, two hundred fifty-one million, four hundred forty-one thousand, two hundred twenty-nine".