642154052 has 6 divisors (see below), whose sum is σ = 1123769598. Its totient is φ = 321077024.

The previous prime is 642154003. The next prime is 642154069. The reversal of 642154052 is 250451246.

It can be written as a sum of positive squares in only one way, i.e., 599956036 + 42198016 = 24494^2 + 6496^2 .

It is a super-3 number, since 3×642154052³ (a number of 27 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80269253 + ... + 80269260.

It is an arithmetic number, because the mean of its divisors is an integer number (187294933).

Almost surely, 2^642154052 is an apocalyptic number.

It is an amenable number.

642154052 is a deficient number, since it is larger than the sum of its proper divisors (481615546).

642154052 is a wasteful number, since it uses less digits than its factorization.

642154052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160538517 (or 160538515 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 642154052 is about 25340.7587100308. The cubic root of 642154052 is about 862.7396192593.

The spelling of 642154052 in words is "six hundred forty-two million, one hundred fifty-four thousand, fifty-two".