1144545461 has 2 divisors, whose sum is σ = 1144545462. Its totient is φ = 1144545460.

The previous prime is 1144545449. The next prime is 1144545469. The reversal of 1144545461 is 1645454411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1049112100 + 95433361 = 32390^2 + 9769^2 .

It is an emirp because it is prime and its reverse (1645454411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1144545461 - 2⁶ = 1144545397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1144545469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572272730 + 572272731.

It is an arithmetic number, because the mean of its divisors is an integer number (572272731).

Almost surely, 2^1144545461 is an apocalyptic number.

It is an amenable number.

1144545461 is a deficient number, since it is larger than the sum of its proper divisors (1).

1144545461 is an equidigital number, since it uses as much as digits as its factorization.

1144545461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38400, while the sum is 35.

The square root of 1144545461 is about 33831.1315359093. The cubic root of 1144545461 is about 1046.0305031886.

Adding to 1144545461 its reverse (1645454411), we get a palindrome (2789999872).

The spelling of 1144545461 in words is "one billion, one hundred forty-four million, five hundred forty-five thousand, four hundred sixty-one".