442001657 has 4 divisors (see below), whose sum is σ = 444471120. Its totient is φ = 439532196.

The previous prime is 442001653. The next prime is 442001663. The reversal of 442001657 is 756100244.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 442001657 - 2² = 442001653 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442001653) 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, 1234463 + ... + 1234820.

It is an arithmetic number, because the mean of its divisors is an integer number (111117780).

Almost surely, 2^442001657 is an apocalyptic number.

It is an amenable number.

442001657 is a deficient number, since it is larger than the sum of its proper divisors (2469463).

442001657 is a wasteful number, since it uses less digits than its factorization.

442001657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2469462.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 442001657 is about 21023.8354493180. The cubic root of 442001657 is about 761.7421121974.

The spelling of 442001657 in words is "four hundred forty-two million, one thousand, six hundred fifty-seven".