442421325 has 24 divisors (see below), whose sum is σ = 812745600. Its totient is φ = 235957680.

The previous prime is 442421279. The next prime is 442421347. The reversal of 442421325 is 523124244.

442421325 is a `hidden beast` number, since 4 + 424 + 213 + 25 = 666.

It is not a de Polignac number, because 442421325 - 2¹⁸ = 442159181 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 327045 + ... + 328394.

It is an arithmetic number, because the mean of its divisors is an integer number (33864400).

Almost surely, 2^442421325 is an apocalyptic number.

442421325 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

442421325 is a deficient number, since it is larger than the sum of its proper divisors (370324275).

442421325 is a wasteful number, since it uses less digits than its factorization.

442421325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655458 (or 655447 counting only the distinct ones).

The product of its digits is 7680, while the sum is 27.

The square root of 442421325 is about 21033.8138481826. The cubic root of 442421325 is about 761.9831200923.

Adding to 442421325 its reverse (523124244), we get a palindrome (965545569).

The spelling of 442421325 in words is "four hundred forty-two million, four hundred twenty-one thousand, three hundred twenty-five".