65421169 has 4 divisors (see below), whose sum is σ = 71368560. Its totient is φ = 59473780.

The previous prime is 65421121. The next prime is 65421179. The reversal of 65421169 is 96112456.

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 a cyclic number.

It is not a de Polignac number, because 65421169 - 2¹¹ = 65419121 is a prime.

It is a super-2 number, since 2×65421169² = 8559858706653122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65421119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2973679 + ... + 2973700.

It is an arithmetic number, because the mean of its divisors is an integer number (17842140).

Almost surely, 2^65421169 is an apocalyptic number.

It is an amenable number.

65421169 is a deficient number, since it is larger than the sum of its proper divisors (5947391).

65421169 is a wasteful number, since it uses less digits than its factorization.

65421169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5947390.

The product of its digits is 12960, while the sum is 34.

The square root of 65421169 is about 8088.3353664397. The cubic root of 65421169 is about 402.9391197926.

The spelling of 65421169 in words is "sixty-five million, four hundred twenty-one thousand, one hundred sixty-nine".