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12320001 = 323736997
BaseRepresentation
bin101110111111…
…110100000001
3212011220212100
4232333310001
511123220001
61120021013
7206501241
oct56776401
925156770
1012320001
116a55221
124161769
132724855
1418c9b21
151135586
hexbbfd01

12320001 has 12 divisors (see below), whose sum is σ = 18277012. Its totient is φ = 7991136.

The previous prime is 12319997. The next prime is 12320017. The reversal of 12320001 is 10002321.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10246401 + 2073600 = 3201^2 + 1440^2 .

It is not a de Polignac number, because 12320001 - 22 = 12319997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12320071) 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, 18166 + ... + 18831.

Almost surely, 212320001 is an apocalyptic number.

It is an amenable number.

12320001 is a deficient number, since it is larger than the sum of its proper divisors (5957011).

12320001 is a wasteful number, since it uses less digits than its factorization.

12320001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37040 (or 37037 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 12320001 is about 3509.9858974076. The cubic root of 12320001 is about 230.9600763072.

Adding to 12320001 its reverse (10002321), we get a palindrome (22322322).

The spelling of 12320001 in words is "twelve million, three hundred twenty thousand, one".

Divisors: 1 3 9 37 111 333 36997 110991 332973 1368889 4106667 12320001