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12308261 = 722391051
BaseRepresentation
bin101110111100…
…111100100101
3212011022202112
4232330330211
511122331021
61115450405
7206422100
oct56747445
925138675
1012308261
116a47419
124156a05
13271c3c4
1418c5737
151131d5b
hexbbcf25

12308261 has 12 divisors (see below), whose sum is σ = 14391360. Its totient is φ = 10495800.

The previous prime is 12308249. The next prime is 12308269. The reversal of 12308261 is 16280321.

It is not a de Polignac number, because 12308261 - 210 = 12307237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12308269) 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, 11186 + ... + 12236.

It is an arithmetic number, because the mean of its divisors is an integer number (1199280).

Almost surely, 212308261 is an apocalyptic number.

It is an amenable number.

12308261 is a deficient number, since it is larger than the sum of its proper divisors (2083099).

12308261 is a wasteful number, since it uses less digits than its factorization.

12308261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1304 (or 1297 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 12308261 is about 3508.3131274161. The cubic root of 12308261 is about 230.8866906794.

Adding to 12308261 its reverse (16280321), we get a palindrome (28588582).

The spelling of 12308261 in words is "twelve million, three hundred eight thousand, two hundred sixty-one".

Divisors: 1 7 49 239 1051 1673 7357 11711 51499 251189 1758323 12308261