61220586 has 16 divisors (see below), whose sum is σ = 139932864. Its totient is φ = 17491584.

The previous prime is 61220581. The next prime is 61220597. The reversal of 61220586 is 68502216.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61220581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 728775 + ... + 728858.

It is an arithmetic number, because the mean of its divisors is an integer number (8745804).

Almost surely, 2^61220586 is an apocalyptic number.

61220586 is an abundant number, since it is smaller than the sum of its proper divisors (78712278).

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

61220586 is a wasteful number, since it uses less digits than its factorization.

61220586 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1457645.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 61220586 is about 7824.3585040564. The cubic root of 61220586 is about 394.1236481372.

The spelling of 61220586 in words is "sixty-one million, two hundred twenty thousand, five hundred eighty-six".