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12010001 = 10721049
BaseRepresentation
bin101101110100…
…001000010001
3211121011121212
4231310020101
511033310001
61105225505
7204040403
oct55641021
924534555
1012010001
116863323
124032295
132646713
141848b73
1510c37bb
hexb74211

12010001 has 6 divisors (see below), whose sum is σ = 12134850. Its totient is φ = 11886416.

The previous prime is 12009997. The next prime is 12010013. The reversal of 12010001 is 10001021.

Adding to 12010001 its reverse (10001021), we get a palindrome (22011022).

Multipling 12010001 by its reverse (10001021), we get a palindrome (120112272211021).

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 11723776 + 286225 = 3424^2 + 535^2 .

It is not a de Polignac number, because 12010001 - 22 = 12009997 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (12010021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10925 + ... + 11973.

It is an arithmetic number, because the mean of its divisors is an integer number (2022475).

Almost surely, 212010001 is an apocalyptic number.

It is an amenable number.

12010001 is a deficient number, since it is larger than the sum of its proper divisors (124849).

12010001 is an equidigital number, since it uses as much as digits as its factorization.

12010001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1263 (or 1156 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 5.

The square root of 12010001 is about 3465.5448345102. The cubic root of 12010001 is about 229.0064324452.

The spelling of 12010001 in words is "twelve million, ten thousand, one".

Divisors: 1 107 1049 11449 112243 12010001