651925 has 12 divisors (see below), whose sum is σ = 820260. Its totient is φ = 513920.

The previous prime is 651913. The next prime is 651943. The reversal of 651925 is 529156.

It can be written as a sum of positive squares in 6 ways, for example, as 676 + 651249 = 26^2 + 807^2 .

It is not a de Polignac number, because 651925 - 2¹¹ = 649877 is a prime.

651925 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 651893 and 651902.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2079 + ... + 2371.

It is an arithmetic number, because the mean of its divisors is an integer number (68355).

2⁶⁵¹⁹²⁵ is an apocalyptic number.

It is an amenable number.

651925 is a deficient number, since it is larger than the sum of its proper divisors (168335).

651925 is a wasteful number, since it uses less digits than its factorization.

651925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392 (or 387 counting only the distinct ones).

The product of its digits is 2700, while the sum is 28.

The square root of 651925 is about 807.4187265601. The cubic root of 651925 is about 86.7093396033.

The spelling of 651925 in words is "six hundred fifty-one thousand, nine hundred twenty-five".