42145305 has 8 divisors (see below), whose sum is σ = 67432512. Its totient is φ = 22477488.

The previous prime is 42145297. The next prime is 42145319. The reversal of 42145305 is 50354124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42145305 - 2³ = 42145297 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1404829 + ... + 1404858.

It is an arithmetic number, because the mean of its divisors is an integer number (8429064).

Almost surely, 2^42145305 is an apocalyptic number.

It is an amenable number.

42145305 is a deficient number, since it is larger than the sum of its proper divisors (25287207).

42145305 is a wasteful number, since it uses less digits than its factorization.

42145305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2809695.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 42145305 is about 6491.9415431749. The cubic root of 42145305 is about 348.0030634557.

Adding to 42145305 its reverse (50354124), we get a palindrome (92499429).

The spelling of 42145305 in words is "forty-two million, one hundred forty-five thousand, three hundred five".