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2405831 is a prime number
BaseRepresentation
bin1001001011010111000111
311112020011212
421023113013
51103441311
6123322035
726310041
oct11132707
94466155
102405831
1113a359a
1298031b
1366308c
14468a91
15327c8b
hex24b5c7

2405831 has 2 divisors, whose sum is σ = 2405832. Its totient is φ = 2405830.

The previous prime is 2405813. The next prime is 2405833. The reversal of 2405831 is 1385042.

Together with previous prime (2405813) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2405831 - 210 = 2404807 is a prime.

It is a super-2 number, since 2×24058312 = 11576045601122, which contains 22 as substring.

Together with 2405833, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2405797 and 2405806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2405833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1202915 + 1202916.

It is an arithmetic number, because the mean of its divisors is an integer number (1202916).

22405831 is an apocalyptic number.

2405831 is a deficient number, since it is larger than the sum of its proper divisors (1).

2405831 is an equidigital number, since it uses as much as digits as its factorization.

2405831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 2405831 is about 1551.0741439403. The cubic root of 2405831 is about 133.9949318645.

The spelling of 2405831 in words is "two million, four hundred five thousand, eight hundred thirty-one".