61143072 has 48 divisors (see below), whose sum is σ = 160917120. Its totient is φ = 20328192.

The previous prime is 61143059. The next prime is 61143073. The reversal of 61143072 is 27034116.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (61143073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58329 + ... + 59367.

It is an arithmetic number, because the mean of its divisors is an integer number (3352440).

Almost surely, 2^61143072 is an apocalyptic number.

It is an amenable number.

61143072 is an abundant number, since it is smaller than the sum of its proper divisors (99774048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61143072 is a wasteful number, since it uses less digits than its factorization.

61143072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1665 (or 1657 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 61143072 is about 7819.4035578169. The cubic root of 61143072 is about 393.9572389540.

Adding to 61143072 its reverse (27034116), we get a palindrome (88177188).

The spelling of 61143072 in words is "sixty-one million, one hundred forty-three thousand, seventy-two".