61286120 has 64 divisors (see below), whose sum is σ = 160980480. Its totient is φ = 20560896.

The previous prime is 61286119. The next prime is 61286131. The reversal of 61286120 is 2168216.

It is a self number, because there is not a number n which added to its sum of digits gives 61286120.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10832 + ... + 15488.

It is an arithmetic number, because the mean of its divisors is an integer number (2515320).

Almost surely, 2^61286120 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61286120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80490240).

61286120 is an abundant number, since it is smaller than the sum of its proper divisors (99694360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61286120 is a wasteful number, since it uses less digits than its factorization.

61286120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4722 (or 4718 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 61286120 is about 7828.5452032929. The cubic root of 61286120 is about 394.2642287829.

The spelling of 61286120 in words is "sixty-one million, two hundred eighty-six thousand, one hundred twenty".