65421208 has 8 divisors (see below), whose sum is σ = 122664780. Its totient is φ = 32710600.

The previous prime is 65421197. The next prime is 65421211. The reversal of 65421208 is 80212456.

It is a tau number, because it is divible by the number of its divisors (8).

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4088818 + ... + 4088833.

Almost surely, 2^65421208 is an apocalyptic number.

It is an amenable number.

65421208 is a deficient number, since it is larger than the sum of its proper divisors (57243572).

65421208 is a wasteful number, since it uses less digits than its factorization.

65421208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8177657 (or 8177653 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 65421208 is about 8088.3377773187. The cubic root of 65421208 is about 402.9391998616.

It can be divided in two parts, 6542 and 1208, that added together give a triangular number (7750 = T₁₂₄).

The spelling of 65421208 in words is "sixty-five million, four hundred twenty-one thousand, two hundred eight".