1251445141 has 2 divisors, whose sum is σ = 1251445142. Its totient is φ = 1251445140.

The previous prime is 1251445133. The next prime is 1251445147. The reversal of 1251445141 is 1415441521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1200622500 + 50822641 = 34650^2 + 7129^2 .

It is a cyclic number.

It is not a de Polignac number, because 1251445141 - 2³ = 1251445133 is a prime.

It is a super-2 number, since 2×1251445141² = 3132229881865019762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1251445147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625722570 + 625722571.

It is an arithmetic number, because the mean of its divisors is an integer number (625722571).

Almost surely, 2^1251445141 is an apocalyptic number.

It is an amenable number.

1251445141 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251445141 is an equidigital number, since it uses as much as digits as its factorization.

1251445141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3200, while the sum is 28.

The square root of 1251445141 is about 35375.7705357777. The cubic root of 1251445141 is about 1077.6323133939.

Adding to 1251445141 its reverse (1415441521), we get a palindrome (2666886662).

The spelling of 1251445141 in words is "one billion, two hundred fifty-one million, four hundred forty-five thousand, one hundred forty-one".