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2143621 is a prime number
BaseRepresentation
bin1000001011010110000101
311000220111101
420023112011
51022043441
6113540101
724135424
oct10132605
94026441
102143621
111234597
12874631
135a091c
143db2bb
152c5231
hex20b585

2143621 has 2 divisors, whose sum is σ = 2143622. Its totient is φ = 2143620.

The previous prime is 2143579. The next prime is 2143627. The reversal of 2143621 is 1263412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2070721 + 72900 = 1439^2 + 270^2 .

It is a cyclic number.

It is not a de Polignac number, because 2143621 - 29 = 2143109 is a prime.

It is a super-2 number, since 2×21436212 = 9190221983282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2143627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071810 + 1071811.

It is an arithmetic number, because the mean of its divisors is an integer number (1071811).

22143621 is an apocalyptic number.

It is an amenable number.

2143621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2143621 is an equidigital number, since it uses as much as digits as its factorization.

2143621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 19.

The square root of 2143621 is about 1464.1109930603. The cubic root of 2143621 is about 128.9385160601.

The spelling of 2143621 in words is "two million, one hundred forty-three thousand, six hundred twenty-one".