61442172 has 48 divisors (see below), whose sum is σ = 173779200. Its totient is φ = 18618480.

The previous prime is 61442167. The next prime is 61442179. The reversal of 61442172 is 27124416.

61442172 is a `hidden beast` number, since 614 + 42 + 1 + 7 + 2 = 666.

61442172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61442179) 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, 24672 + ... + 27047.

It is an arithmetic number, because the mean of its divisors is an integer number (3620400).

Almost surely, 2^61442172 is an apocalyptic number.

It is an amenable number.

61442172 is an abundant number, since it is smaller than the sum of its proper divisors (112337028).

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

61442172 is a wasteful number, since it uses less digits than its factorization.

61442172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51743 (or 51735 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 61442172 is about 7838.5057249453. The cubic root of 61442172 is about 394.5985816754.

Adding to 61442172 its reverse (27124416), we get a palindrome (88566588).

The spelling of 61442172 in words is "sixty-one million, four hundred forty-two thousand, one hundred seventy-two".