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1312213 = 71711027
BaseRepresentation
bin101000000010111010101
32110200000111
411000113111
5313442323
644043021
714103460
oct5002725
92420014
101312213
11816981
12533471
1336c376
142622d7
151adc0d
hex1405d5

1312213 has 8 divisors (see below), whose sum is σ = 1588032. Its totient is φ = 1058496.

The previous prime is 1312211. The next prime is 1312229. The reversal of 1312213 is 3122131.

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 1312213 - 21 = 1312211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1312193 and 1312202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312211) 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, 5395 + ... + 5632.

It is an arithmetic number, because the mean of its divisors is an integer number (198504).

21312213 is an apocalyptic number.

It is an amenable number.

1312213 is a deficient number, since it is larger than the sum of its proper divisors (275819).

1312213 is a wasteful number, since it uses less digits than its factorization.

1312213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11051.

The product of its digits is 36, while the sum is 13.

The square root of 1312213 is about 1145.5186598218. The cubic root of 1312213 is about 109.4799974583.

Adding to 1312213 its reverse (3122131), we get a palindrome (4434344).

The spelling of 1312213 in words is "one million, three hundred twelve thousand, two hundred thirteen".

Divisors: 1 7 17 119 11027 77189 187459 1312213