64122540 has 24 divisors (see below), whose sum is σ = 179543280. Its totient is φ = 17099328.

The previous prime is 64122533. The next prime is 64122559. The reversal of 64122540 is 4522146.

It is a super-2 number, since 2×64122540² = 8223400272103200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64122540.

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, 534295 + ... + 534414.

It is an arithmetic number, because the mean of its divisors is an integer number (7480970).

Almost surely, 2^64122540 is an apocalyptic number.

64122540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64122540 is an abundant number, since it is smaller than the sum of its proper divisors (115420740).

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

64122540 is a wasteful number, since it uses less digits than its factorization.

64122540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068721 (or 1068719 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 64122540 is about 8007.6550874772. The cubic root of 64122540 is about 400.2551289052.

Adding to 64122540 its reverse (4522146), we get a palindrome (68644686).

The spelling of 64122540 in words is "sixty-four million, one hundred twenty-two thousand, five hundred forty".