1145121541 has 2 divisors, whose sum is σ = 1145121542. Its totient is φ = 1145121540.

The previous prime is 1145121529. The next prime is 1145121557. The reversal of 1145121541 is 1451215411.

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., 1132053316 + 13068225 = 33646^2 + 3615^2 .

It is a cyclic number.

It is not a de Polignac number, because 1145121541 - 2¹⁹ = 1144597253 is a prime.

It is a super-2 number, since 2×1145121541² = 2622606687324429362, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1145121041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572560770 + 572560771.

It is an arithmetic number, because the mean of its divisors is an integer number (572560771).

Almost surely, 2^1145121541 is an apocalyptic number.

It is an amenable number.

1145121541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1145121541 is an equidigital number, since it uses as much as digits as its factorization.

1145121541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 800, while the sum is 25.

The square root of 1145121541 is about 33839.6445164544. The cubic root of 1145121541 is about 1046.2059720247.

Adding to 1145121541 its reverse (1451215411), we get a palindrome (2596336952).

The spelling of 1145121541 in words is "one billion, one hundred forty-five million, one hundred twenty-one thousand, five hundred forty-one".