65745421 has 16 divisors (see below), whose sum is σ = 76384000. Its totient is φ = 55427328.

The previous prime is 65745419. The next prime is 65745437. The reversal of 65745421 is 12454756.

It is a cyclic number.

It is not a de Polignac number, because 65745421 - 2¹ = 65745419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65745461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151621 + ... + 152053.

It is an arithmetic number, because the mean of its divisors is an integer number (4774000).

Almost surely, 2^65745421 is an apocalyptic number.

It is an amenable number.

65745421 is a deficient number, since it is larger than the sum of its proper divisors (10638579).

65745421 is a wasteful number, since it uses less digits than its factorization.

65745421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748.

The product of its digits is 33600, while the sum is 34.

The square root of 65745421 is about 8108.3550119614. The cubic root of 65745421 is about 403.6037290893.

It can be divided in two parts, 65745 and 421, that added together give a palindrome (66166).

The spelling of 65745421 in words is "sixty-five million, seven hundred forty-five thousand, four hundred twenty-one".