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1390121 is a prime number
BaseRepresentation
bin101010011011000101001
32121121212222
411103120221
5323440441
645443425
714546555
oct5233051
92547788
101390121
1186a467
12570575
13398975
14282865
151c6d4b
hex153629

1390121 has 2 divisors, whose sum is σ = 1390122. Its totient is φ = 1390120.

The previous prime is 1390117. The next prime is 1390157. The reversal of 1390121 is 1210931.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1345600 + 44521 = 1160^2 + 211^2 .

It is a cyclic number.

It is not a de Polignac number, because 1390121 - 22 = 1390117 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1390121.

It is not a weakly prime, because it can be changed into another prime (1390111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695060 + 695061.

It is an arithmetic number, because the mean of its divisors is an integer number (695061).

21390121 is an apocalyptic number.

It is an amenable number.

1390121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1390121 is an equidigital number, since it uses as much as digits as its factorization.

1390121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 1390121 is about 1179.0339265687. The cubic root of 1390121 is about 111.6051412267.

The spelling of 1390121 in words is "one million, three hundred ninety thousand, one hundred twenty-one".