65099421 has 12 divisors (see below), whose sum is σ = 94159260. Its totient is φ = 43341120.

The previous prime is 65099401. The next prime is 65099459. The reversal of 65099421 is 12499056.

It can be written as a sum of positive squares in 2 ways, for example, as 50765625 + 14333796 = 7125^2 + 3786^2 .

It is not a de Polignac number, because 65099421 - 2⁵ = 65099389 is a prime.

It is a super-2 number, since 2×65099421² = 8475869229070482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65099401) 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, 2811 + ... + 11751.

It is an arithmetic number, because the mean of its divisors is an integer number (7846605).

Almost surely, 2^65099421 is an apocalyptic number.

It is an amenable number.

65099421 is a deficient number, since it is larger than the sum of its proper divisors (29059839).

65099421 is a wasteful number, since it uses less digits than its factorization.

65099421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9756 (or 9753 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 65099421 is about 8068.4212210320. The cubic root of 65099421 is about 402.2774686478.

The spelling of 65099421 in words is "sixty-five million, ninety-nine thousand, four hundred twenty-one".