65127921 has 4 divisors (see below), whose sum is σ = 86837232. Its totient is φ = 43418612.

The previous prime is 65127919. The next prime is 65127941. The reversal of 65127921 is 12972156.

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 65127921 - 2¹ = 65127919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65127911) 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, 10854651 + ... + 10854656.

It is an arithmetic number, because the mean of its divisors is an integer number (21709308).

Almost surely, 2^65127921 is an apocalyptic number.

It is an amenable number.

65127921 is a deficient number, since it is larger than the sum of its proper divisors (21709311).

65127921 is a wasteful number, since it uses less digits than its factorization.

65127921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21709310.

The product of its digits is 7560, while the sum is 33.

The square root of 65127921 is about 8070.1871725506. The cubic root of 65127921 is about 402.3361646905.

The spelling of 65127921 in words is "sixty-five million, one hundred twenty-seven thousand, nine hundred twenty-one".