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265021 is a prime number
BaseRepresentation
bin1000000101100111101
3111110112121
41000230331
531440041
65402541
72152441
oct1005475
9443477
10265021
11171129
12109451
1393823
146c821
15537d1
hex40b3d

265021 has 2 divisors, whose sum is σ = 265022. Its totient is φ = 265020.

The previous prime is 265007. The next prime is 265037. The reversal of 265021 is 120562.

It is a happy number.

It is an a-pointer prime, because the next prime (265037) can be obtained adding 265021 to its sum of digits (16).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 168921 + 96100 = 411^2 + 310^2 .

It is a cyclic number.

It is not a de Polignac number, because 265021 - 27 = 264893 is a prime.

It is a super-2 number, since 2×2650212 = 140472260882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 264986 and 265004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (265091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132510 + 132511.

It is an arithmetic number, because the mean of its divisors is an integer number (132511).

2265021 is an apocalyptic number.

It is an amenable number.

265021 is a deficient number, since it is larger than the sum of its proper divisors (1).

265021 is an equidigital number, since it uses as much as digits as its factorization.

265021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 265021 is about 514.8019036484. The cubic root of 265021 is about 64.2332795241.

Adding to 265021 its reverse (120562), we get a palindrome (385583).

The spelling of 265021 in words is "two hundred sixty-five thousand, twenty-one".