61135243 has 6 divisors (see below), whose sum is σ = 66199884. Its totient is φ = 56432376.

The previous prime is 61135241. The next prime is 61135267. The reversal of 61135243 is 34253116.

It is not a de Polignac number, because 61135243 - 2¹ = 61135241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61135241) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 180705 + ... + 181042.

It is an arithmetic number, because the mean of its divisors is an integer number (11033314).

Almost surely, 2^61135243 is an apocalyptic number.

61135243 is a deficient number, since it is larger than the sum of its proper divisors (5064641).

61135243 is a wasteful number, since it uses less digits than its factorization.

61135243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361773 (or 361760 counting only the distinct ones).

The product of its digits is 2160, while the sum is 25.

The square root of 61135243 is about 7818.9029281607. The cubic root of 61135243 is about 393.9404236236.

Adding to 61135243 its reverse (34253116), we get a palindrome (95388359).

The spelling of 61135243 in words is "sixty-one million, one hundred thirty-five thousand, two hundred forty-three".