64530121 has 4 divisors (see below), whose sum is σ = 64646532. Its totient is φ = 64413712.

The previous prime is 64530091. The next prime is 64530149. The reversal of 64530121 is 12103546.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12531600 + 51998521 = 3540^2 + 7211^2 .

It is a cyclic number.

It is not a de Polignac number, because 64530121 - 2²³ = 56141513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64530092 and 64530101.

It is not an unprimeable number, because it can be changed into a prime (64530161) 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, 57370 + ... + 58483.

It is an arithmetic number, because the mean of its divisors is an integer number (16161633).

Almost surely, 2^64530121 is an apocalyptic number.

It is an amenable number.

64530121 is a deficient number, since it is larger than the sum of its proper divisors (116411).

64530121 is a wasteful number, since it uses less digits than its factorization.

64530121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116410.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 64530121 is about 8033.0642347737. The cubic root of 64530121 is about 401.1013833534.

Adding to 64530121 its reverse (12103546), we get a palindrome (76633667).

The spelling of 64530121 in words is "sixty-four million, five hundred thirty thousand, one hundred twenty-one".