651025 has 6 divisors (see below), whose sum is σ = 807302. Its totient is φ = 520800.

The previous prime is 651019. The next prime is 651029. The reversal of 651025 is 520156.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 156816 + 494209 = 396^2 + 703^2 .

It is not a de Polignac number, because 651025 - 2³ = 651017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 650993 and 651011.

It is not an unprimeable number, because it can be changed into a prime (651029) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 12996 + ... + 13045.

2⁶⁵¹⁰²⁵ is an apocalyptic number.

It is an amenable number.

651025 is a deficient number, since it is larger than the sum of its proper divisors (156277).

651025 is a wasteful number, since it uses less digits than its factorization.

651025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26051 (or 26046 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 651025 is about 806.8612024382. The cubic root of 651025 is about 86.6694197022.

The spelling of 651025 in words is "six hundred fifty-one thousand, twenty-five".