65421236 has 12 divisors (see below), whose sum is σ = 121221828. Its totient is φ = 30786432.

The previous prime is 65421229. The next prime is 65421247. The reversal of 65421236 is 63212456.

It can be written as a sum of positive squares in 2 ways, for example, as 20611600 + 44809636 = 4540^2 + 6694^2 .

It is a junction number, because it is equal to n+sod(n) for n = 65421199 and 65421208.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 480971 + ... + 481106.

It is an arithmetic number, because the mean of its divisors is an integer number (10101819).

Almost surely, 2^65421236 is an apocalyptic number.

It is an amenable number.

65421236 is a deficient number, since it is larger than the sum of its proper divisors (55800592).

65421236 is a wasteful number, since it uses less digits than its factorization.

65421236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 962098 (or 962096 counting only the distinct ones).

The product of its digits is 8640, while the sum is 29.

The square root of 65421236 is about 8088.3395082056. The cubic root of 65421236 is about 402.9392573470.

The spelling of 65421236 in words is "sixty-five million, four hundred twenty-one thousand, two hundred thirty-six".