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1340221 is a prime number
BaseRepresentation
bin101000111001100111101
32112002102211
411013030331
5320341341
644420421
714251231
oct5071475
92462384
101340221
11835a23
12547711
1337c03c
1426c5c1
151b7181
hex14733d

1340221 has 2 divisors, whose sum is σ = 1340222. Its totient is φ = 1340220.

The previous prime is 1340179. The next prime is 1340237. The reversal of 1340221 is 1220431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1240996 + 99225 = 1114^2 + 315^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340221 - 219 = 815933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1340281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670110 + 670111.

It is an arithmetic number, because the mean of its divisors is an integer number (670111).

21340221 is an apocalyptic number.

It is an amenable number.

1340221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340221 is an equidigital number, since it uses as much as digits as its factorization.

1340221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1340221 is about 1157.6791438045. The cubic root of 1340221 is about 110.2534376751.

Adding to 1340221 its reverse (1220431), we get a palindrome (2560652).

The spelling of 1340221 in words is "one million, three hundred forty thousand, two hundred twenty-one".