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12691601 = 131951383
BaseRepresentation
bin110000011010…
…100010010001
3212212210121022
4300122202101
511222112401
61132005225
7212606516
oct60324221
925783538
1012691601
11718942a
124300815
132824a30
14198530d
1511aa71b
hexc1a891

12691601 has 8 divisors (see below), whose sum is σ = 14387520. Its totient is φ = 11098512.

The previous prime is 12691583. The next prime is 12691621. The reversal of 12691601 is 10619621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12691601 - 210 = 12690577 is a prime.

It is a super-2 number, since 2×126916012 = 322153471886402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12691621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25445 + ... + 25938.

It is an arithmetic number, because the mean of its divisors is an integer number (1798440).

Almost surely, 212691601 is an apocalyptic number.

It is an amenable number.

12691601 is a deficient number, since it is larger than the sum of its proper divisors (1695919).

12691601 is a wasteful number, since it uses less digits than its factorization.

12691601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51415.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 12691601 is about 3562.5273332285. The cubic root of 12691601 is about 233.2592116040.

The spelling of 12691601 in words is "twelve million, six hundred ninety-one thousand, six hundred one".

Divisors: 1 13 19 247 51383 667979 976277 12691601