61004005 has 8 divisors (see below), whose sum is σ = 73577592. Its totient is φ = 48554688.

The previous prime is 61003993. The next prime is 61004039. The reversal of 61004005 is 50040016.

It can be written as a sum of positive squares in 4 ways, for example, as 20223009 + 40780996 = 4497^2 + 6386^2 .

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 61004005 - 2²³ = 52615397 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 61004005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29982 + ... + 31951.

It is an arithmetic number, because the mean of its divisors is an integer number (9197199).

Almost surely, 2^61004005 is an apocalyptic number.

It is an amenable number.

61004005 is a deficient number, since it is larger than the sum of its proper divisors (12573587).

61004005 is a wasteful number, since it uses less digits than its factorization.

61004005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62135.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 61004005 is about 7810.5060655504. The cubic root of 61004005 is about 393.6583332426.

The spelling of 61004005 in words is "sixty-one million, four thousand, five".