642143510 has 32 divisors (see below), whose sum is σ = 1214734752. Its totient is φ = 244097280.

The previous prime is 642143503. The next prime is 642143519. The reversal of 642143510 is 15341246.

It is a self number, because there is not a number n which added to its sum of digits gives 642143510.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642143519) 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 15 ways as a sum of consecutive naturals, for example, 4271 + ... + 36090.

It is an arithmetic number, because the mean of its divisors is an integer number (37960461).

Almost surely, 2^642143510 is an apocalyptic number.

642143510 is a deficient number, since it is larger than the sum of its proper divisors (572591242).

642143510 is a wasteful number, since it uses less digits than its factorization.

642143510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40448.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 642143510 is about 25340.5507043553. The cubic root of 642143510 is about 862.7348981435.

Adding to 642143510 its reverse (15341246), we get a palindrome (657484756).

The spelling of 642143510 in words is "six hundred forty-two million, one hundred forty-three thousand, five hundred ten".