65421244 has 12 divisors (see below), whose sum is σ = 130842544. Its totient is φ = 28037664.

The previous prime is 65421229. The next prime is 65421247. The reversal of 65421244 is 44212456.

65421244 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 2336473 = 65421244 / (6 + 5 + 4 + 2 + 1 + 2 + 4 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65421247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1168209 + ... + 1168264.

Almost surely, 2^65421244 is an apocalyptic number.

It is an amenable number.

65421244 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65421244 is a wasteful number, since it uses less digits than its factorization.

65421244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2336484 (or 2336482 counting only the distinct ones).

The product of its digits is 7680, while the sum is 28.

The square root of 65421244 is about 8088.3400027447. The cubic root of 65421244 is about 402.9392737714.

The spelling of 65421244 in words is "sixty-five million, four hundred twenty-one thousand, two hundred forty-four".