642375 has 24 divisors (see below), whose sum is σ = 1160016. Its totient is φ = 342000.

The previous prime is 642373. The next prime is 642403. The reversal of 642375 is 573246.

It is a happy number.

It is not a de Polignac number, because 642375 - 2¹ = 642373 is a prime.

It is a d-powerful number, because it can be written as 6 + 4³ + 3⁵ + 2¹⁹ + 7⁶ + 5³ .

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 840 + ... + 1410.

It is an arithmetic number, because the mean of its divisors is an integer number (48334).

2⁶⁴²³⁷⁵ is an apocalyptic number.

642375 is a deficient number, since it is larger than the sum of its proper divisors (517641).

642375 is a wasteful number, since it uses less digits than its factorization.

642375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592 (or 579 counting only the distinct ones).

The product of its digits is 5040, while the sum is 27.

The square root of 642375 is about 801.4830004436. The cubic root of 642375 is about 86.2838556440.

The spelling of 642375 in words is "six hundred forty-two thousand, three hundred seventy-five".