442187745 has 16 divisors (see below), whose sum is σ = 720850752. Its totient is φ = 231383360.

The previous prime is 442187717. The next prime is 442187761. The reversal of 442187745 is 547781244.

It is not a de Polignac number, because 442187745 - 2⁷ = 442187617 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 442187697 and 442187706.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 277311 + ... + 278900.

It is an arithmetic number, because the mean of its divisors is an integer number (45053172).

Almost surely, 2^442187745 is an apocalyptic number.

It is an amenable number.

442187745 is a deficient number, since it is larger than the sum of its proper divisors (278663007).

442187745 is a wasteful number, since it uses less digits than its factorization.

442187745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556272.

The product of its digits is 250880, while the sum is 42.

The square root of 442187745 is about 21028.2606270704. The cubic root of 442187745 is about 761.8489980545.

The spelling of 442187745 in words is "four hundred forty-two million, one hundred eighty-seven thousand, seven hundred forty-five".