65267021 has 2 divisors, whose sum is σ = 65267022. Its totient is φ = 65267020.

The previous prime is 65266987. The next prime is 65267047. The reversal of 65267021 is 12076256.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41744521 + 23522500 = 6461^2 + 4850^2 .

It is a cyclic number.

It is not a de Polignac number, because 65267021 - 2¹⁰ = 65265997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65260021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32633510 + 32633511.

It is an arithmetic number, because the mean of its divisors is an integer number (32633511).

Almost surely, 2^65267021 is an apocalyptic number.

It is an amenable number.

65267021 is a deficient number, since it is larger than the sum of its proper divisors (1).

65267021 is an equidigital number, since it uses as much as digits as its factorization.

65267021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 65267021 is about 8078.8007154528. The cubic root of 65267021 is about 402.6223970959.

The spelling of 65267021 in words is "sixty-five million, two hundred sixty-seven thousand, twenty-one".