65421160 has 64 divisors (see below), whose sum is σ = 173675520. Its totient is φ = 21703680.

The previous prime is 65421121. The next prime is 65421179. The reversal of 65421160 is 6112456.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4912 + ... + 12448.

It is an arithmetic number, because the mean of its divisors is an integer number (2713680).

Almost surely, 2^65421160 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65421160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86837760).

65421160 is an abundant number, since it is smaller than the sum of its proper divisors (108254360).

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

65421160 is a wasteful number, since it uses less digits than its factorization.

65421160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7586 (or 7582 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 65421160 is about 8088.3348100830. The cubic root of 65421160 is about 402.9391013151.

The spelling of 65421160 in words is "sixty-five million, four hundred twenty-one thousand, one hundred sixty".