61205225 has 12 divisors (see below), whose sum is σ = 78512460. Its totient is φ = 47275200.

The previous prime is 61205203. The next prime is 61205227. The reversal of 61205225 is 52250216.

It can be written as a sum of positive squares in 6 ways, for example, as 1545049 + 59660176 = 1243^2 + 7724^2 .

It is not a de Polignac number, because 61205225 - 2¹⁸ = 60943081 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 61205225.

It is not an unprimeable number, because it can be changed into a prime (61205227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41486 + ... + 42935.

It is an arithmetic number, because the mean of its divisors is an integer number (6542705).

Almost surely, 2^61205225 is an apocalyptic number.

It is an amenable number.

61205225 is a deficient number, since it is larger than the sum of its proper divisors (17307235).

61205225 is a wasteful number, since it uses less digits than its factorization.

61205225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84460 (or 84455 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 61205225 is about 7823.3768284546. The cubic root of 61205225 is about 394.0906818853.

The spelling of 61205225 in words is "sixty-one million, two hundred five thousand, two hundred twenty-five".