642095 has 8 divisors (see below), whose sum is σ = 785376. Its totient is φ = 503776.

The previous prime is 642079. The next prime is 642113. The reversal of 642095 is 590246.

642095 = 83² + 84² + ... + 135².

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

It is a cyclic number.

It is not a de Polignac number, because 642095 - 2⁴ = 642079 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 947 + ... + 1476.

It is an arithmetic number, because the mean of its divisors is an integer number (98172).

2⁶⁴²⁰⁹⁵ is an apocalyptic number.

642095 is a deficient number, since it is larger than the sum of its proper divisors (143281).

642095 is a wasteful number, since it uses less digits than its factorization.

642095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2481.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 642095 is about 801.3083052109. The cubic root of 642095 is about 86.2713172821.

The spelling of 642095 in words is "six hundred forty-two thousand, ninety-five".