1145131549 has 2 divisors, whose sum is σ = 1145131550. Its totient is φ = 1145131548.

The previous prime is 1145131541. The next prime is 1145131553. The reversal of 1145131549 is 9451315411.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1095146649 + 49984900 = 33093^2 + 7070^2 .

It is a cyclic number.

It is not a de Polignac number, because 1145131549 - 2³ = 1145131541 is a prime.

It is a super-2 number, since 2×1145131549² = 2622652529030278802, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1145131541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572565774 + 572565775.

It is an arithmetic number, because the mean of its divisors is an integer number (572565775).

Almost surely, 2^1145131549 is an apocalyptic number.

It is an amenable number.

1145131549 is a deficient number, since it is larger than the sum of its proper divisors (1).

1145131549 is an equidigital number, since it uses as much as digits as its factorization.

1145131549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 34.

The square root of 1145131549 is about 33839.7923900251. The cubic root of 1145131549 is about 1046.2090198522.

The spelling of 1145131549 in words is "one billion, one hundred forty-five million, one hundred thirty-one thousand, five hundred forty-nine".