42979505 has 8 divisors (see below), whose sum is σ = 51642600. Its totient is φ = 34338816.

The previous prime is 42979487. The next prime is 42979507. The reversal of 42979505 is 50597924.

42979505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 312481 + 42667024 = 559^2 + 6532^2 .

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 42979505 - 2²⁴ = 26202289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42979507) 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 in 7 ways as a sum of consecutive naturals, for example, 1040 + ... + 9329.

It is an arithmetic number, because the mean of its divisors is an integer number (6455325).

Almost surely, 2^42979505 is an apocalyptic number.

It is an amenable number.

42979505 is a deficient number, since it is larger than the sum of its proper divisors (8663095).

42979505 is a wasteful number, since it uses less digits than its factorization.

42979505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11203.

The product of its (nonzero) digits is 113400, while the sum is 41.

The square root of 42979505 is about 6555.8756089481. The cubic root of 42979505 is about 350.2841366170.

The spelling of 42979505 in words is "forty-two million, nine hundred seventy-nine thousand, five hundred five".