61428961 has 8 divisors (see below), whose sum is σ = 68278464. Its totient is φ = 54790320.

The previous prime is 61428959. The next prime is 61428967. The reversal of 61428961 is 16982416.

It is a happy number.

61428961 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 61428961 - 2¹ = 61428959 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61428961.

It is not an unprimeable number, because it can be changed into a prime (61428967) 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, 52101 + ... + 53266.

It is an arithmetic number, because the mean of its divisors is an integer number (8534808).

Almost surely, 2^61428961 is an apocalyptic number.

It is an amenable number.

61428961 is a deficient number, since it is larger than the sum of its proper divisors (6849503).

61428961 is a wasteful number, since it uses less digits than its factorization.

61428961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105431.

The product of its digits is 20736, while the sum is 37.

The square root of 61428961 is about 7837.6629807615. The cubic root of 61428961 is about 394.5702980858.

The spelling of 61428961 in words is "sixty-one million, four hundred twenty-eight thousand, nine hundred sixty-one".