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1641281 is a prime number
BaseRepresentation
bin110010000101101000001
310002101102012
412100231001
5410010111
655102305
716644035
oct6205501
93071365
101641281
11a21134
12671995
13456095
1430a1c5
1522648b
hex190b41

1641281 has 2 divisors, whose sum is σ = 1641282. Its totient is φ = 1641280.

The previous prime is 1641253. The next prime is 1641301. The reversal of 1641281 is 1821461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1488400 + 152881 = 1220^2 + 391^2 .

It is a cyclic number.

It is not a de Polignac number, because 1641281 - 26 = 1641217 is a prime.

It is a super-2 number, since 2×16412812 = 5387606641922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1641881) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820640 + 820641.

It is an arithmetic number, because the mean of its divisors is an integer number (820641).

21641281 is an apocalyptic number.

It is an amenable number.

1641281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1641281 is an equidigital number, since it uses as much as digits as its factorization.

1641281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 384, while the sum is 23.

The square root of 1641281 is about 1281.1248963313. The cubic root of 1641281 is about 117.9580670691.

The spelling of 1641281 in words is "one million, six hundred forty-one thousand, two hundred eighty-one".