Search a number
-
+
12013007 = 12179871
BaseRepresentation
bin101101110100…
…110111001111
3211121022202012
4231310313033
511033404012
61105251435
7204052226
oct55646717
924538665
1012013007
116865606
124033b7b
132647bb6
141849cbd
1510c4622
hexb74dcf

12013007 has 4 divisors (see below), whose sum is σ = 12024096. Its totient is φ = 12001920.

The previous prime is 12012971. The next prime is 12013009. The reversal of 12013007 is 70031021.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 70031021 = 233044827.

It is a cyclic number.

It is not a de Polignac number, because 12013007 - 210 = 12011983 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12012982 and 12013000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12013009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3719 + ... + 6152.

It is an arithmetic number, because the mean of its divisors is an integer number (3006024).

Almost surely, 212013007 is an apocalyptic number.

12013007 is a deficient number, since it is larger than the sum of its proper divisors (11089).

12013007 is an equidigital number, since it uses as much as digits as its factorization.

12013007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11088.

The product of its (nonzero) digits is 42, while the sum is 14.

The square root of 12013007 is about 3465.9785054152. The cubic root of 12013007 is about 229.0255369651.

Adding to 12013007 its reverse (70031021), we get a palindrome (82044028).

The spelling of 12013007 in words is "twelve million, thirteen thousand, seven".

Divisors: 1 1217 9871 12013007