61240543 has 24 divisors (see below), whose sum is σ = 77425152. Its totient is φ = 48009024.

The previous prime is 61240541. The next prime is 61240561. The reversal of 61240543 is 34504216.

It is not a de Polignac number, because 61240543 - 2¹ = 61240541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61240541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80521 + ... + 81277.

It is an arithmetic number, because the mean of its divisors is an integer number (3226048).

Almost surely, 2^61240543 is an apocalyptic number.

61240543 is a deficient number, since it is larger than the sum of its proper divisors (16184609).

61240543 is a wasteful number, since it uses less digits than its factorization.

61240543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911 (or 904 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 61240543 is about 7825.6337123584. The cubic root of 61240543 is about 394.1664696326.

Adding to 61240543 its reverse (34504216), we get a palindrome (95744759).

The spelling of 61240543 in words is "sixty-one million, two hundred forty thousand, five hundred forty-three".