42575405 has 4 divisors (see below), whose sum is σ = 51090492. Its totient is φ = 34060320.

The previous prime is 42575389. The next prime is 42575411. The reversal of 42575405 is 50457524.

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 23687689 + 18887716 = 4867^2 + 4346^2 .

It is not a de Polignac number, because 42575405 - 2⁴ = 42575389 is a prime.

It is a super-2 number, since 2×42575405² = 3625330221828050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4257536 + ... + 4257545.

It is an arithmetic number, because the mean of its divisors is an integer number (12772623).

Almost surely, 2^42575405 is an apocalyptic number.

It is an amenable number.

42575405 is a deficient number, since it is larger than the sum of its proper divisors (8515087).

42575405 is an equidigital number, since it uses as much as digits as its factorization.

42575405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8515086.

The product of its (nonzero) digits is 28000, while the sum is 32.

The square root of 42575405 is about 6524.9831417407. The cubic root of 42575405 is about 349.1828692730.

The spelling of 42575405 in words is "forty-two million, five hundred seventy-five thousand, four hundred five".