61042005 has 20 divisors (see below), whose sum is σ = 109424172. Its totient is φ = 32555520.

The previous prime is 61041991. The next prime is 61042021. The reversal of 61042005 is 50024016.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 28483569 + 32558436 = 5337^2 + 5706^2 .

It is not a de Polignac number, because 61042005 - 2⁶ = 61041941 is a prime.

It is a super-3 number, since 3×61042005³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 74956 + ... + 75765.

Almost surely, 2^61042005 is an apocalyptic number.

It is an amenable number.

61042005 is a deficient number, since it is larger than the sum of its proper divisors (48382167).

61042005 is a wasteful number, since it uses less digits than its factorization.

61042005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150738 (or 150729 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 61042005 is about 7812.9383077047. The cubic root of 61042005 is about 393.7400541705.

The spelling of 61042005 in words is "sixty-one million, forty-two thousand, five".