442391253 has 8 divisors (see below), whose sum is σ = 590810400. Its totient is φ = 294449808.

The previous prime is 442391239. The next prime is 442391293. The reversal of 442391253 is 352193244.

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

It is not a de Polignac number, because 442391253 - 2⁴ = 442391237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442391233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117258 + ... + 120971.

It is an arithmetic number, because the mean of its divisors is an integer number (73851300).

Almost surely, 2^442391253 is an apocalyptic number.

It is an amenable number.

442391253 is a deficient number, since it is larger than the sum of its proper divisors (148419147).

442391253 is a wasteful number, since it uses less digits than its factorization.

442391253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238851.

The product of its digits is 25920, while the sum is 33.

The square root of 442391253 is about 21033.0989870727. The cubic root of 442391253 is about 761.9658553462.

The spelling of 442391253 in words is "four hundred forty-two million, three hundred ninety-one thousand, two hundred fifty-three".