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1994005 = 51330677
BaseRepresentation
bin111100110110100010101
310202022021001
413212310111
51002302010
6110423301
722643266
oct7466425
93668231
101994005
111142142
12801b31
1354a7b0
1439c96d
15295c3a
hex1e6d15

1994005 has 8 divisors (see below), whose sum is σ = 2576952. Its totient is φ = 1472448.

The previous prime is 1993997. The next prime is 1994033. The reversal of 1994005 is 5004991.

1994005 = 9982 + 9992.

It can be written as a sum of positive squares in 4 ways, for example, as 125316 + 1868689 = 354^2 + 1367^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1994005 - 23 = 1993997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15274 + ... + 15403.

It is an arithmetic number, because the mean of its divisors is an integer number (322119).

21994005 is an apocalyptic number.

1994005 is the 999-th centered square number.

It is an amenable number.

1994005 is a deficient number, since it is larger than the sum of its proper divisors (582947).

1994005 is a wasteful number, since it uses less digits than its factorization.

1994005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30695.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 1994005 is about 1412.0924190718. The cubic root of 1994005 is about 125.8660918858.

Adding to 1994005 its reverse (5004991), we get a palindrome (6998996).

The spelling of 1994005 in words is "one million, nine hundred ninety-four thousand, five".

Divisors: 1 5 13 65 30677 153385 398801 1994005