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1316821 = 11592029
BaseRepresentation
bin101000001011111010101
32110220100011
411001133111
5314114241
644120221
714123062
oct5013725
92426304
101316821
1181a390
12536071
133714ac
14263c69
151b0281
hex1417d5

1316821 has 8 divisors (see below), whose sum is σ = 1461600. Its totient is φ = 1176240.

The previous prime is 1316813. The next prime is 1316831. The reversal of 1316821 is 1286131.

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 1316821 - 23 = 1316813 is a prime.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 1316792 and 1316801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1316801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 366 + ... + 1663.

It is an arithmetic number, because the mean of its divisors is an integer number (182700).

21316821 is an apocalyptic number.

1316821 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1316821 is a deficient number, since it is larger than the sum of its proper divisors (144779).

1316821 is a wasteful number, since it uses less digits than its factorization.

1316821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2099.

The product of its digits is 288, while the sum is 22.

The square root of 1316821 is about 1147.5282131608. The cubic root of 1316821 is about 109.6079986437.

The spelling of 1316821 in words is "one million, three hundred sixteen thousand, eight hundred twenty-one".

Divisors: 1 11 59 649 2029 22319 119711 1316821