1145242541 has 2 divisors, whose sum is σ = 1145242542. Its totient is φ = 1145242540.

The previous prime is 1145242529. The next prime is 1145242559. The reversal of 1145242541 is 1452425411.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1113556900 + 31685641 = 33370^2 + 5629^2 .

It is an emirp because it is prime and its reverse (1452425411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1145242541 - 2¹⁴ = 1145226157 is a prime.

It is a super-2 number, since 2×1145242541² = 2623160955432273362, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1145247541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572621270 + 572621271.

It is an arithmetic number, because the mean of its divisors is an integer number (572621271).

Almost surely, 2^1145242541 is an apocalyptic number.

It is an amenable number.

1145242541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1145242541 is an equidigital number, since it uses as much as digits as its factorization.

1145242541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6400, while the sum is 29.

The square root of 1145242541 is about 33841.4323130685. The cubic root of 1145242541 is about 1046.2428200679.

Adding to 1145242541 its reverse (1452425411), we get a palindrome (2597667952).

The spelling of 1145242541 in words is "one billion, one hundred forty-five million, two hundred forty-two thousand, five hundred forty-one".