65421572 has 12 divisors (see below), whose sum is σ = 114623040. Its totient is φ = 32672136.

The previous prime is 65421571. The next prime is 65421611. The reversal of 65421572 is 27512456.

It is not an unprimeable number, because it can be changed into a prime (65421571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5672 + ... + 12767.

It is an arithmetic number, because the mean of its divisors is an integer number (9551920).

Almost surely, 2^65421572 is an apocalyptic number.

It is an amenable number.

65421572 is a deficient number, since it is larger than the sum of its proper divisors (49201468).

65421572 is a wasteful number, since it uses less digits than its factorization.

65421572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19330 (or 19328 counting only the distinct ones).

The product of its digits is 16800, while the sum is 32.

The square root of 65421572 is about 8088.3602788204. The cubic root of 65421572 is about 402.9399471707.

The spelling of 65421572 in words is "sixty-five million, four hundred twenty-one thousand, five hundred seventy-two".