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21141269 = 79267611
BaseRepresentation
bin101000010100…
…1011100010101
31110210002100222
41100221130111
520403010034
62033044125
7344461232
oct120513425
943702328
1021141269
1110a2a826
1270b6645
1344c2a36
142b44789
151cc912e
hex1429715

21141269 has 4 divisors (see below), whose sum is σ = 21408960. Its totient is φ = 20873580.

The previous prime is 21141259. The next prime is 21141271. The reversal of 21141269 is 96214112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-21141269 is a prime.

It is a super-2 number, since 2×211412692 = 893906509860722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21141259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133727 + ... + 133884.

It is an arithmetic number, because the mean of its divisors is an integer number (5352240).

Almost surely, 221141269 is an apocalyptic number.

It is an amenable number.

21141269 is a deficient number, since it is larger than the sum of its proper divisors (267691).

21141269 is an equidigital number, since it uses as much as digits as its factorization.

21141269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267690.

The product of its digits is 864, while the sum is 26.

The square root of 21141269 is about 4597.9635709736. The cubic root of 21141269 is about 276.5096870799.

The spelling of 21141269 in words is "twenty-one million, one hundred forty-one thousand, two hundred sixty-nine".

Divisors: 1 79 267611 21141269