642273854 has 8 divisors (see below), whose sum is σ = 963774288. Its totient is φ = 321015760.

The previous prime is 642273851. The next prime is 642273857. The reversal of 642273854 is 458372246.

It is an interprime number because it is at equal distance from previous prime (642273851) and next prime (642273857).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642273851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53807 + ... + 64650.

It is an arithmetic number, because the mean of its divisors is an integer number (120471786).

Almost surely, 2^642273854 is an apocalyptic number.

642273854 is a deficient number, since it is larger than the sum of its proper divisors (321500434).

642273854 is a wasteful number, since it uses less digits than its factorization.

642273854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121170.

The product of its digits is 322560, while the sum is 41.

The square root of 642273854 is about 25343.1224200965. The cubic root of 642273854 is about 862.7932676035.

The spelling of 642273854 in words is "six hundred forty-two million, two hundred seventy-three thousand, eight hundred fifty-four".