642285039 has 16 divisors (see below), whose sum is σ = 934738560. Its totient is φ = 389052960.

The previous prime is 642285029. The next prime is 642285047. The reversal of 642285039 is 930582246.

It is a happy number.

It is not a de Polignac number, because 642285039 - 2⁹ = 642284527 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 642284988 and 642285006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642285019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74764 + ... + 82910.

It is an arithmetic number, because the mean of its divisors is an integer number (58421160).

Almost surely, 2^642285039 is an apocalyptic number.

642285039 is a deficient number, since it is larger than the sum of its proper divisors (292453521).

642285039 is a wasteful number, since it uses less digits than its factorization.

642285039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10550.

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 642285039 is about 25343.3430904449. The cubic root of 642285039 is about 862.7982760002.

The spelling of 642285039 in words is "six hundred forty-two million, two hundred eighty-five thousand, thirty-nine".