61442405 has 8 divisors (see below), whose sum is σ = 73836672. Its totient is φ = 49083408.

The previous prime is 61442401. The next prime is 61442429. The reversal of 61442405 is 50424416.

61442405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 61442405 - 2² = 61442401 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61442401) 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 7 ways as a sum of consecutive naturals, for example, 4817 + ... + 12086.

It is an arithmetic number, because the mean of its divisors is an integer number (9229584).

Almost surely, 2^61442405 is an apocalyptic number.

It is an amenable number.

61442405 is a deficient number, since it is larger than the sum of its proper divisors (12394267).

61442405 is a wasteful number, since it uses less digits than its factorization.

61442405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17635.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 61442405 is about 7838.5205874578. The cubic root of 61442405 is about 394.5990804716.

The spelling of 61442405 in words is "sixty-one million, four hundred forty-two thousand, four hundred five".