61645042 has 8 divisors (see below), whose sum is σ = 94212396. Its totient is φ = 30240912.

The previous prime is 61645033. The next prime is 61645061. The reversal of 61645042 is 24054616.

61645042 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 51854401 + 9790641 = 7201^2 + 3129^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×61645042² = 7600222406363528, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61645042.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 290673 + ... + 290884.

Almost surely, 2^61645042 is an apocalyptic number.

61645042 is a deficient number, since it is larger than the sum of its proper divisors (32567354).

61645042 is a wasteful number, since it uses less digits than its factorization.

61645042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581612.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 61645042 is about 7851.4356648959. The cubic root of 61645042 is about 395.0324002691.

Adding to 61645042 its reverse (24054616), we get a palindrome (85699658).

The spelling of 61645042 in words is "sixty-one million, six hundred forty-five thousand, forty-two".