65421207 has 6 divisors (see below), whose sum is σ = 94497312. Its totient is φ = 43614132.

The previous prime is 65421197. The next prime is 65421211. The reversal of 65421207 is 70212456.

65421207 is a `hidden beast` number, since 654 + 2 + 1 + 2 + 0 + 7 = 666.

It is not a de Polignac number, because 65421207 - 2⁷ = 65421079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65421247) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3634503 + ... + 3634520.

It is an arithmetic number, because the mean of its divisors is an integer number (15749552).

Almost surely, 2^65421207 is an apocalyptic number.

65421207 is a deficient number, since it is larger than the sum of its proper divisors (29076105).

65421207 is a wasteful number, since it uses less digits than its factorization.

65421207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7269029 (or 7269026 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 65421207 is about 8088.3377155013. The cubic root of 65421207 is about 402.9391978085.

The spelling of 65421207 in words is "sixty-five million, four hundred twenty-one thousand, two hundred seven".