42646145 has 4 divisors (see below), whose sum is σ = 51175380. Its totient is φ = 34116912.

The previous prime is 42646063. The next prime is 42646187. The reversal of 42646145 is 54164624.

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 8271376 + 34374769 = 2876^2 + 5863^2 .

It is a cyclic number.

It is not a de Polignac number, because 42646145 - 2¹⁶ = 42580609 is a prime.

It is a super-2 number, since 2×42646145² = 3637387366722050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4264610 + ... + 4264619.

It is an arithmetic number, because the mean of its divisors is an integer number (12793845).

Almost surely, 2^42646145 is an apocalyptic number.

It is an amenable number.

42646145 is a deficient number, since it is larger than the sum of its proper divisors (8529235).

42646145 is an equidigital number, since it uses as much as digits as its factorization.

42646145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8529234.

The product of its digits is 23040, while the sum is 32.

The square root of 42646145 is about 6530.4015956142. The cubic root of 42646145 is about 349.3761540130.

The spelling of 42646145 in words is "forty-two million, six hundred forty-six thousand, one hundred forty-five".