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1989242 = 2994621
BaseRepresentation
bin111100101101001111010
310202001201122
413211221322
51002123432
6110345242
722623353
oct7455172
93661648
101989242
111139602
127bb222
13548588
1439ad2a
15294612
hex1e5a7a

1989242 has 4 divisors (see below), whose sum is σ = 2983866. Its totient is φ = 994620.

The previous prime is 1989241. The next prime is 1989259. The reversal of 1989242 is 2429891.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1957201 + 32041 = 1399^2 + 179^2 .

It is not an unprimeable number, because it can be changed into a prime (1989241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497309 + ... + 497312.

21989242 is an apocalyptic number.

1989242 is a deficient number, since it is larger than the sum of its proper divisors (994624).

1989242 is an equidigital number, since it uses as much as digits as its factorization.

1989242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994623.

The product of its digits is 10368, while the sum is 35.

The square root of 1989242 is about 1410.4049064010. The cubic root of 1989242 is about 125.7657948849.

The spelling of 1989242 in words is "one million, nine hundred eighty-nine thousand, two hundred forty-two".

Divisors: 1 2 994621 1989242