65123421 has 8 divisors (see below), whose sum is σ = 94725024. Its totient is φ = 39468720.

The previous prime is 65123407. The next prime is 65123449. The reversal of 65123421 is 12432156.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 65123421 - 2¹³ = 65115229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 65123391 and 65123400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65123221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 986686 + ... + 986751.

It is an arithmetic number, because the mean of its divisors is an integer number (11840628).

Almost surely, 2^65123421 is an apocalyptic number.

It is an amenable number.

65123421 is a deficient number, since it is larger than the sum of its proper divisors (29601603).

65123421 is a wasteful number, since it uses less digits than its factorization.

65123421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1973451.

The product of its digits is 1440, while the sum is 24.

The square root of 65123421 is about 8069.9083637920. The cubic root of 65123421 is about 402.3268980329.

Adding to 65123421 its reverse (12432156), we get a palindrome (77555577).

The spelling of 65123421 in words is "sixty-five million, one hundred twenty-three thousand, four hundred twenty-one".