61912420 has 12 divisors (see below), whose sum is σ = 130016124. Its totient is φ = 24764960.

The previous prime is 61912399. The next prime is 61912421. The reversal of 61912420 is 2421916.

61912420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 36288576 + 25623844 = 6024^2 + 5062^2 .

It is not an unprimeable number, because it can be changed into a prime (61912421) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1547791 + ... + 1547830.

It is an arithmetic number, because the mean of its divisors is an integer number (10834677).

Almost surely, 2^61912420 is an apocalyptic number.

It is an amenable number.

61912420 is an abundant number, since it is smaller than the sum of its proper divisors (68103704).

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

61912420 is a wasteful number, since it uses less digits than its factorization.

61912420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3095630 (or 3095628 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 61912420 is about 7868.4445731034. Note that the first 3 decimals coincide. The cubic root of 61912420 is about 395.6027117795.

The spelling of 61912420 in words is "sixty-one million, nine hundred twelve thousand, four hundred twenty".