61042045 has 8 divisors (see below), whose sum is σ = 75230424. Its totient is φ = 47513664.

The previous prime is 61042021. The next prime is 61042057. The reversal of 61042045 is 54024016.

It can be written as a sum of positive squares in 4 ways, for example, as 7722841 + 53319204 = 2779^2 + 7302^2 .

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 61042045 - 2¹⁹ = 60517757 is a prime.

It is a super-2 number, since 2×61042045² = 7452262515564050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164794 + ... + 165163.

It is an arithmetic number, because the mean of its divisors is an integer number (9403803).

Almost surely, 2^61042045 is an apocalyptic number.

It is an amenable number.

61042045 is a deficient number, since it is larger than the sum of its proper divisors (14188379).

61042045 is a wasteful number, since it uses less digits than its factorization.

61042045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329999.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 61042045 is about 7812.9408675607. The cubic root of 61042045 is about 393.7401401747.

The spelling of 61042045 in words is "sixty-one million, forty-two thousand, forty-five".