61865236 has 12 divisors (see below), whose sum is σ = 111997620. Its totient is φ = 29865920.

The previous prime is 61865231. The next prime is 61865249. The reversal of 61865236 is 63256816.

It can be written as a sum of positive squares in 2 ways, for example, as 20340100 + 41525136 = 4510^2 + 6444^2 .

It is a junction number, because it is equal to n+sod(n) for n = 61865195 and 61865204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61865231) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 266545 + ... + 266776.

It is an arithmetic number, because the mean of its divisors is an integer number (9333135).

Almost surely, 2^61865236 is an apocalyptic number.

It is an amenable number.

61865236 is a deficient number, since it is larger than the sum of its proper divisors (50132384).

61865236 is a wasteful number, since it uses less digits than its factorization.

61865236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533354 (or 533352 counting only the distinct ones).

The product of its digits is 51840, while the sum is 37.

The square root of 61865236 is about 7865.4456962082. The cubic root of 61865236 is about 395.5021888030.

The spelling of 61865236 in words is "sixty-one million, eight hundred sixty-five thousand, two hundred thirty-six".