642125702 has 16 divisors (see below), whose sum is σ = 969064800. Its totient is φ = 319109760.

The previous prime is 642125681. The next prime is 642125719. The reversal of 642125702 is 207521246.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 340799 + ... + 342677.

It is an arithmetic number, because the mean of its divisors is an integer number (60566550).

Almost surely, 2^642125702 is an apocalyptic number.

642125702 is a deficient number, since it is larger than the sum of its proper divisors (326939098).

642125702 is a wasteful number, since it uses less digits than its factorization.

642125702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2831.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 642125702 is about 25340.1993283399. The cubic root of 642125702 is about 862.7269229143.

Adding to 642125702 its reverse (207521246), we get a palindrome (849646948).

It can be divided in two parts, 6421 and 25702, that added together give a palindrome (32123).

The spelling of 642125702 in words is "six hundred forty-two million, one hundred twenty-five thousand, seven hundred two".