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87269 = 7213137
BaseRepresentation
bin10101010011100101
311102201012
4111103211
510243034
61512005
7512300
oct252345
9142635
1087269
115a626
1242605
1330950
1423b37
151acce
hex154e5

87269 has 12 divisors (see below), whose sum is σ = 110124. Its totient is φ = 68544.

The previous prime is 87257. The next prime is 87277. The reversal of 87269 is 96278.

It can be written as a sum of positive squares in 2 ways, for example, as 30625 + 56644 = 175^2 + 238^2 .

It is not a de Polignac number, because 87269 - 24 = 87253 is a prime.

It is a super-2 number, since 2×872692 = 15231756722, which contains 22 as substring.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87299) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 569 + ... + 705.

It is an arithmetic number, because the mean of its divisors is an integer number (9177).

287269 is an apocalyptic number.

It is an amenable number.

87269 is a deficient number, since it is larger than the sum of its proper divisors (22855).

87269 is a wasteful number, since it uses less digits than its factorization.

87269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164 (or 157 counting only the distinct ones).

The product of its digits is 6048, while the sum is 32.

The square root of 87269 is about 295.4132698441. The cubic root of 87269 is about 44.3560978809.

Subtracting 87269 from its reverse (96278), we obtain a palindrome (9009).

The spelling of 87269 in words is "eighty-seven thousand, two hundred sixty-nine".

Divisors: 1 7 13 49 91 137 637 959 1781 6713 12467 87269