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1380289 is a prime number
BaseRepresentation
bin101010000111111000001
32121010101211
411100333001
5323132124
645330121
714506111
oct5207701
92533354
101380289
11863039
12566941
13394351
1427d041
151c3e94
hex150fc1

1380289 has 2 divisors, whose sum is σ = 1380290. Its totient is φ = 1380288.

The previous prime is 1380283. The next prime is 1380307. The reversal of 1380289 is 9820831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1040400 + 339889 = 1020^2 + 583^2 .

It is a cyclic number.

It is not a de Polignac number, because 1380289 - 213 = 1372097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1380289.

It is not a weakly prime, because it can be changed into another prime (1380283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690144 + 690145.

It is an arithmetic number, because the mean of its divisors is an integer number (690145).

21380289 is an apocalyptic number.

It is an amenable number.

1380289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1380289 is an equidigital number, since it uses as much as digits as its factorization.

1380289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 1380289 is about 1174.8570125764. The cubic root of 1380289 is about 111.3413994499.

The spelling of 1380289 in words is "one million, three hundred eighty thousand, two hundred eighty-nine".