635721125 has 32 divisors (see below), whose sum is σ = 867310080. Its totient is φ = 462369600.

The previous prime is 635721109. The next prime is 635721179. The reversal of 635721125 is 521127536.

635721125 is digitally balanced in base 2 and base 6, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 635721125 - 2⁴ = 635721109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 635721091 and 635721100.

It is a congruent number.

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, 105956 + ... + 111794.

It is an arithmetic number, because the mean of its divisors is an integer number (27103440).

Almost surely, 2^635721125 is an apocalyptic number.

635721125 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

635721125 is a deficient number, since it is larger than the sum of its proper divisors (231588955).

635721125 is a wasteful number, since it uses less digits than its factorization.

635721125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5934 (or 5924 counting only the distinct ones).

The product of its digits is 12600, while the sum is 32.

The square root of 635721125 is about 25213.5107630810. The cubic root of 635721125 is about 859.8490473291.

The spelling of 635721125 in words is "six hundred thirty-five million, seven hundred twenty-one thousand, one hundred twenty-five".