61123143 has 16 divisors (see below), whose sum is σ = 86666976. Its totient is φ = 38184960.

The previous prime is 61123141. The next prime is 61123147. The reversal of 61123143 is 34132116.

61123143 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61123143 - 2¹ = 61123141 is a prime.

It is a super-2 number, since 2×61123143² = 7472077220396898, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61123141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9805 + ... + 14777.

It is an arithmetic number, because the mean of its divisors is an integer number (5416686).

Almost surely, 2^61123143 is an apocalyptic number.

61123143 is a deficient number, since it is larger than the sum of its proper divisors (25543833).

61123143 is a wasteful number, since it uses less digits than its factorization.

61123143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5234.

The product of its digits is 432, while the sum is 21.

The square root of 61123143 is about 7818.1291240296. The cubic root of 61123143 is about 393.9144321038.

Adding to 61123143 its reverse (34132116), we get a palindrome (95255259).

The spelling of 61123143 in words is "sixty-one million, one hundred twenty-three thousand, one hundred forty-three".