64725420 has 24 divisors (see below), whose sum is σ = 181231344. Its totient is φ = 17260096.

The previous prime is 64725413. The next prime is 64725421. The reversal of 64725420 is 2452746.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (64725421) 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, 539319 + ... + 539438.

It is an arithmetic number, because the mean of its divisors is an integer number (7551306).

Almost surely, 2^64725420 is an apocalyptic number.

64725420 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64725420 is an abundant number, since it is smaller than the sum of its proper divisors (116505924).

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

64725420 is a wasteful number, since it uses less digits than its factorization.

64725420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1078769 (or 1078767 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 30.

The square root of 64725420 is about 8045.2109978546. The cubic root of 64725420 is about 401.5056173471.

The spelling of 64725420 in words is "sixty-four million, seven hundred twenty-five thousand, four hundred twenty".