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442681 = 19231013
BaseRepresentation
bin1101100000100111001
3211111020121
41230010321
5103131211
613253241
73522421
oct1540471
9744217
10442681
11282658
12194221
13126655
14b7481
158b271
hex6c139

442681 has 8 divisors (see below), whose sum is σ = 486720. Its totient is φ = 400752.

The previous prime is 442633. The next prime is 442691. The reversal of 442681 is 186244.

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

It is not a de Polignac number, because 442681 - 217 = 311609 is a prime.

It is a super-2 number, since 2×4426812 = 391932935522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70 + ... + 943.

It is an arithmetic number, because the mean of its divisors is an integer number (60840).

2442681 is an apocalyptic number.

It is an amenable number.

442681 is a deficient number, since it is larger than the sum of its proper divisors (44039).

442681 is a wasteful number, since it uses less digits than its factorization.

442681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1055.

The product of its digits is 1536, while the sum is 25.

The square root of 442681 is about 665.3427688042. The cubic root of 442681 is about 76.2132170523.

The spelling of 442681 in words is "four hundred forty-two thousand, six hundred eighty-one".

Divisors: 1 19 23 437 1013 19247 23299 442681