65452540 has 24 divisors (see below), whose sum is σ = 138035520. Its totient is φ = 26069568.

The previous prime is 65452531. The next prime is 65452559. The reversal of 65452540 is 4525456.

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, 2067 + ... + 11626.

It is an arithmetic number, because the mean of its divisors is an integer number (5751480).

Almost surely, 2^65452540 is an apocalyptic number.

It is an amenable number.

65452540 is an abundant number, since it is smaller than the sum of its proper divisors (72582980).

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

65452540 is a wasteful number, since it uses less digits than its factorization.

65452540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13941 (or 13939 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 31.

The square root of 65452540 is about 8090.2744082015. The cubic root of 65452540 is about 403.0035157843.

Adding to 65452540 its reverse (4525456), we get a palindrome (69977996).

The spelling of 65452540 in words is "sixty-five million, four hundred fifty-two thousand, five hundred forty".