442645141 has 4 divisors (see below), whose sum is σ = 442687500. Its totient is φ = 442602784.

The previous prime is 442645129. The next prime is 442645153. The reversal of 442645141 is 141546244.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (442645129) and next prime (442645153).

It can be written as a sum of positive squares in 2 ways, for example, as 168610225 + 274034916 = 12985^2 + 16554^2 .

It is a cyclic number.

It is not a de Polignac number, because 442645141 - 2²⁵ = 409090709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442645121) 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, 6945 + ... + 30553.

It is an arithmetic number, because the mean of its divisors is an integer number (110671875).

Almost surely, 2^442645141 is an apocalyptic number.

It is an amenable number.

442645141 is a deficient number, since it is larger than the sum of its proper divisors (42359).

442645141 is a wasteful number, since it uses less digits than its factorization.

442645141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42358.

The product of its digits is 15360, while the sum is 31.

The square root of 442645141 is about 21039.1335610571. The cubic root of 442645141 is about 762.1115913433. Note that the first 3 decimals are identical.

The spelling of 442645141 in words is "four hundred forty-two million, six hundred forty-five thousand, one hundred forty-one".