42104765 has 4 divisors (see below), whose sum is σ = 50525724. Its totient is φ = 33683808.

The previous prime is 42104761. The next prime is 42104771. The reversal of 42104765 is 56740124.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6416089 + 35688676 = 2533^2 + 5974^2 .

It is a cyclic number.

It is not a de Polignac number, because 42104765 - 2² = 42104761 is a prime.

It is a super-2 number, since 2×42104765² = 3545622471410450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42104761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4210472 + ... + 4210481.

It is an arithmetic number, because the mean of its divisors is an integer number (12631431).

Almost surely, 2^42104765 is an apocalyptic number.

It is an amenable number.

42104765 is a deficient number, since it is larger than the sum of its proper divisors (8420959).

42104765 is an equidigital number, since it uses as much as digits as its factorization.

42104765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8420958.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 42104765 is about 6488.8184594732. The cubic root of 42104765 is about 347.8914450902.

Adding to 42104765 its reverse (56740124), we get a palindrome (98844889).

The spelling of 42104765 in words is "forty-two million, one hundred four thousand, seven hundred sixty-five".