65472121 has 24 divisors (see below), whose sum is σ = 79319520. Its totient is φ = 53539200.

The previous prime is 65472109. The next prime is 65472133. The reversal of 65472121 is 12127456.

It is an interprime number because it is at equal distance from previous prime (65472109) and next prime (65472133).

It is not a de Polignac number, because 65472121 - 2⁵ = 65472089 is a prime.

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

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65472121.

It is not an unprimeable number, because it can be changed into a prime (65472181) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 75790 + ... + 76648.

It is an arithmetic number, because the mean of its divisors is an integer number (3304980).

Almost surely, 2^65472121 is an apocalyptic number.

It is an amenable number.

65472121 is a deficient number, since it is larger than the sum of its proper divisors (13847399).

65472121 is a wasteful number, since it uses less digits than its factorization.

65472121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 937 (or 924 counting only the distinct ones).

The product of its digits is 3360, while the sum is 28.

The square root of 65472121 is about 8091.4844744336. The cubic root of 65472121 is about 403.0436997357.

Adding to 65472121 its reverse (12127456), we get a palindrome (77599577).

It can be divided in two parts, 6547 and 2121, that added together give a palindrome (8668).

The spelling of 65472121 in words is "sixty-five million, four hundred seventy-two thousand, one hundred twenty-one".