65421051 has 8 divisors (see below), whose sum is σ = 87667200. Its totient is φ = 43394472.

The previous prime is 65421043. The next prime is 65421073. The reversal of 65421051 is 15012456.

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

It is not a de Polignac number, because 65421051 - 2³ = 65421043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65421001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54195 + ... + 55388.

It is an arithmetic number, because the mean of its divisors is an integer number (10958400).

Almost surely, 2^65421051 is an apocalyptic number.

65421051 is a deficient number, since it is larger than the sum of its proper divisors (22246149).

65421051 is a wasteful number, since it uses less digits than its factorization.

65421051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109785.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 65421051 is about 8088.3280719813. The cubic root of 65421051 is about 402.9388775324.

The spelling of 65421051 in words is "sixty-five million, four hundred twenty-one thousand, fifty-one".