61145205 has 32 divisors (see below), whose sum is σ = 108338688. Its totient is φ = 29198400.

The previous prime is 61145197. The next prime is 61145221. The reversal of 61145205 is 50254116.

It is not a de Polignac number, because 61145205 - 2³ = 61145197 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8290 + ... + 13820.

It is an arithmetic number, because the mean of its divisors is an integer number (3385584).

Almost surely, 2^61145205 is an apocalyptic number.

It is an amenable number.

61145205 is a deficient number, since it is larger than the sum of its proper divisors (47193483).

61145205 is a wasteful number, since it uses less digits than its factorization.

61145205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5617.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 61145205 is about 7819.5399481044. The cubic root of 61145205 is about 393.9618200182.

The spelling of 61145205 in words is "sixty-one million, one hundred forty-five thousand, two hundred five".