65142921 has 12 divisors (see below), whose sum is σ = 87479952. Its totient is φ = 43118928.

The previous prime is 65142901. The next prime is 65142947. The reversal of 65142921 is 12924156.

It is not a de Polignac number, because 65142921 - 2²² = 60948617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65142901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 230046 + ... + 230328.

It is an arithmetic number, because the mean of its divisors is an integer number (7289996).

Almost surely, 2^65142921 is an apocalyptic number.

It is an amenable number.

65142921 is a deficient number, since it is larger than the sum of its proper divisors (22337031).

65142921 is an equidigital number, since it uses as much as digits as its factorization.

65142921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840 (or 563 counting only the distinct ones).

The product of its digits is 4320, while the sum is 30.

The square root of 65142921 is about 8071.1164655207. The cubic root of 65142921 is about 402.3670504669.

The spelling of 65142921 in words is "sixty-five million, one hundred forty-two thousand, nine hundred twenty-one".