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1311601 = 1777153
BaseRepresentation
bin101000000001101110001
32110122011211
411000031301
5313432401
644040121
714101624
oct5001561
92418154
101311601
11816475
12533041
1336bcc5
14261dbb
151ad951
hex140371

1311601 has 4 divisors (see below), whose sum is σ = 1388772. Its totient is φ = 1234432.

The previous prime is 1311599. The next prime is 1311617. The reversal of 1311601 is 1061131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1061131 = 1955849.

It can be written as a sum of positive squares in 2 ways, for example, as 998001 + 313600 = 999^2 + 560^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311601 - 21 = 1311599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311691) 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, 38560 + ... + 38593.

It is an arithmetic number, because the mean of its divisors is an integer number (347193).

21311601 is an apocalyptic number.

It is an amenable number.

1311601 is a deficient number, since it is larger than the sum of its proper divisors (77171).

1311601 is an equidigital number, since it uses as much as digits as its factorization.

1311601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77170.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 1311601 is about 1145.2515007630. The cubic root of 1311601 is about 109.4629747704.

Adding to 1311601 its reverse (1061131), we get a palindrome (2372732).

The spelling of 1311601 in words is "one million, three hundred eleven thousand, six hundred one".

Divisors: 1 17 77153 1311601