61123785 has 16 divisors (see below), whose sum is σ = 100953600. Its totient is φ = 31547520.

The previous prime is 61123763. The next prime is 61123807. The reversal of 61123785 is 58732116.

61123785 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (61123763) and next prime (61123807).

It is not a de Polignac number, because 61123785 - 2²¹ = 59026633 is a prime.

It is a super-2 number, since 2×61123785² = 7472234185452450, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65260 + ... + 66189.

It is an arithmetic number, because the mean of its divisors is an integer number (6309600).

Almost surely, 2^61123785 is an apocalyptic number.

It is an amenable number.

61123785 is a deficient number, since it is larger than the sum of its proper divisors (39829815).

61123785 is a wasteful number, since it uses less digits than its factorization.

61123785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131488.

The product of its digits is 10080, while the sum is 33.

The square root of 61123785 is about 7818.1701823381. The cubic root of 61123785 is about 393.9158112441.

The spelling of 61123785 in words is "sixty-one million, one hundred twenty-three thousand, seven hundred eighty-five".