61428573 has 6 divisors (see below), whose sum is σ = 88730174. Its totient is φ = 40952376.

The previous prime is 61428559. The next prime is 61428581. The reversal of 61428573 is 37582416.

61428573 is a `hidden beast` number, since 61 + 4 + 28 + 573 = 666.

It can be written as a sum of positive squares in only one way, i.e., 52446564 + 8982009 = 7242^2 + 2997^2 .

It is not a de Polignac number, because 61428573 - 2⁴ = 61428557 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 (61428533) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3412690 + ... + 3412707.

Almost surely, 2^61428573 is an apocalyptic number.

It is an amenable number.

61428573 is a deficient number, since it is larger than the sum of its proper divisors (27301601).

61428573 is a wasteful number, since it uses less digits than its factorization.

61428573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6825403 (or 6825400 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 61428573 is about 7837.6382284461. The cubic root of 61428573 is about 394.5694673506.

It can be divided in two parts, 61428 and 573, that added together give a square (62001 = 249²).

The spelling of 61428573 in words is "sixty-one million, four hundred twenty-eight thousand, five hundred seventy-three".