65470121 has 4 divisors (see below), whose sum is σ = 68316672. Its totient is φ = 62623572.

The previous prime is 65470103. The next prime is 65470129. The reversal of 65470121 is 12107456.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 65470121 - 2¹⁰ = 65469097 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65470129) 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, 1423241 + ... + 1423286.

It is an arithmetic number, because the mean of its divisors is an integer number (17079168).

Almost surely, 2^65470121 is an apocalyptic number.

It is an amenable number.

65470121 is a deficient number, since it is larger than the sum of its proper divisors (2846551).

65470121 is a wasteful number, since it uses less digits than its factorization.

65470121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2846550.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 65470121 is about 8091.3608867730. The cubic root of 65470121 is about 403.0395957212.

Adding to 65470121 its reverse (12107456), we get a palindrome (77577577).

The spelling of 65470121 in words is "sixty-five million, four hundred seventy thousand, one hundred twenty-one".