642243345 has 32 divisors (see below), whose sum is σ = 1042965504. Its totient is φ = 337440000.

The previous prime is 642243331. The next prime is 642243359. The reversal of 642243345 is 543342246.

642243345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (642243331) and next prime (642243359).

It is not a de Polignac number, because 642243345 - 2²⁰ = 641194769 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 336895 + ... + 338795.

It is an arithmetic number, because the mean of its divisors is an integer number (32592672).

Almost surely, 2^642243345 is an apocalyptic number.

It is an amenable number.

642243345 is a deficient number, since it is larger than the sum of its proper divisors (400722159).

642243345 is a wasteful number, since it uses less digits than its factorization.

642243345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2233.

The product of its digits is 69120, while the sum is 33.

The square root of 642243345 is about 25342.5204942208. The cubic root of 642243345 is about 862.7796060496.

The spelling of 642243345 in words is "six hundred forty-two million, two hundred forty-three thousand, three hundred forty-five".