651257 has 2 divisors, whose sum is σ = 651258. Its totient is φ = 651256.

The previous prime is 651251. The next prime is 651271. The reversal of 651257 is 752156.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 541696 + 109561 = 736^2 + 331^2 .

It is a cyclic number.

It is not a de Polignac number, because 651257 - 2⁶ = 651193 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 651257.

It is not a weakly prime, because it can be changed into another prime (651251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325628 + 325629.

It is an arithmetic number, because the mean of its divisors is an integer number (325629).

2⁶⁵¹²⁵⁷ is an apocalyptic number.

It is an amenable number.

651257 is a deficient number, since it is larger than the sum of its proper divisors (1).

651257 is an equidigital number, since it uses as much as digits as its factorization.

651257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2100, while the sum is 26.

The square root of 651257 is about 807.0049566143. The cubic root of 651257 is about 86.6797136834.

The spelling of 651257 in words is "six hundred fifty-one thousand, two hundred fifty-seven".