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79042 = 239521
BaseRepresentation
bin10011010011000010
311000102111
4103103002
510012132
61405534
7446305
oct232302
9130374
1079042
1154427
12398aa
1329c92
1420b3c
1518647
hex134c2

79042 has 4 divisors (see below), whose sum is σ = 118566. Its totient is φ = 39520.

The previous prime is 79039. The next prime is 79043. The reversal of 79042 is 24097.

79042 is nontrivially palindromic in base 13.

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., 78961 + 81 = 281^2 + 9^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (79043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19759 + ... + 19762.

279042 is an apocalyptic number.

79042 is a deficient number, since it is larger than the sum of its proper divisors (39524).

79042 is a wasteful number, since it uses less digits than its factorization.

79042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39523.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 79042 is about 281.1440911703. The cubic root of 79042 is about 42.9160069441.

Subtracting from 79042 its reverse (24097), we obtain a palindrome (54945).

The spelling of 79042 in words is "seventy-nine thousand, forty-two".

Divisors: 1 2 39521 79042