45121543 has 2 divisors, whose sum is σ = 45121544. Its totient is φ = 45121542.

The previous prime is 45121541. The next prime is 45121547. The reversal of 45121543 is 34512154.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 45121543 - 2¹ = 45121541 is a prime.

Together with 45121541, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45121541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22560771 + 22560772.

It is an arithmetic number, because the mean of its divisors is an integer number (22560772).

Almost surely, 2^45121543 is an apocalyptic number.

45121543 is a deficient number, since it is larger than the sum of its proper divisors (1).

45121543 is an equidigital number, since it uses as much as digits as its factorization.

45121543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2400, while the sum is 25.

The square root of 45121543 is about 6717.2571039078. The cubic root of 45121543 is about 356.0092762596.

Adding to 45121543 its reverse (34512154), we get a palindrome (79633697).

The spelling of 45121543 in words is "forty-five million, one hundred twenty-one thousand, five hundred forty-three".