64812120 has 32 divisors (see below), whose sum is σ = 194436720. Its totient is φ = 17283200.

The previous prime is 64812113. The next prime is 64812133. The reversal of 64812120 is 2121846.

It is a super-2 number, since 2×64812120² = 8401221797788800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 269931 + ... + 270170.

Almost surely, 2^64812120 is an apocalyptic number.

64812120 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64812120 is an abundant number, since it is smaller than the sum of its proper divisors (129624600).

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

64812120 is a wasteful number, since it uses less digits than its factorization.

64812120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540115 (or 540111 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 64812120 is about 8050.5974933541. The cubic root of 64812120 is about 401.6848102393.

Adding to 64812120 its reverse (2121846), we get a palindrome (66933966).

The spelling of 64812120 in words is "sixty-four million, eight hundred twelve thousand, one hundred twenty".