61005265 has 16 divisors (see below), whose sum is σ = 77794128. Its totient is φ = 45766656.

The previous prime is 61005251. The next prime is 61005283. The reversal of 61005265 is 56250016.

It can be written as a sum of positive squares in 8 ways, for example, as 8573184 + 52432081 = 2928^2 + 7241^2 .

It is a cyclic number.

It is not a de Polignac number, because 61005265 - 2⁷ = 61005137 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25459 + ... + 27751.

It is an arithmetic number, because the mean of its divisors is an integer number (4862133).

Almost surely, 2^61005265 is an apocalyptic number.

It is an amenable number.

61005265 is a deficient number, since it is larger than the sum of its proper divisors (16788863).

61005265 is a wasteful number, since it uses less digits than its factorization.

61005265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2628.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 61005265 is about 7810.5867257204. The cubic root of 61005265 is about 393.6610434804.

The spelling of 61005265 in words is "sixty-one million, five thousand, two hundred sixty-five".