61385825 has 12 divisors (see below), whose sum is σ = 77368188. Its totient is φ = 48302400.

The previous prime is 61385803. The next prime is 61385839. The reversal of 61385825 is 52858316.

It can be written as a sum of positive squares in 6 ways, for example, as 3519376 + 57866449 = 1876^2 + 7607^2 .

It is not a de Polignac number, because 61385825 - 2⁶ = 61385761 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18602 + ... + 21651.

It is an arithmetic number, because the mean of its divisors is an integer number (6447349).

Almost surely, 2^61385825 is an apocalyptic number.

It is an amenable number.

61385825 is a deficient number, since it is larger than the sum of its proper divisors (15982363).

61385825 is a wasteful number, since it uses less digits than its factorization.

61385825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40324 (or 40319 counting only the distinct ones).

The product of its digits is 57600, while the sum is 38.

The square root of 61385825 is about 7834.9106567976. The cubic root of 61385825 is about 394.4779194555.

It can be divided in two parts, 6 and 1385825, that added together give a palindrome (1385831).

The spelling of 61385825 in words is "sixty-one million, three hundred eighty-five thousand, eight hundred twenty-five".