670261 has 2 divisors, whose sum is σ = 670262. Its totient is φ = 670260.

The previous prime is 670249. The next prime is 670279. The reversal of 670261 is 162076.

670261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 656100 + 14161 = 810^2 + 119^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-670261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (670211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335130 + 335131.

It is an arithmetic number, because the mean of its divisors is an integer number (335131).

2⁶⁷⁰²⁶¹ is an apocalyptic number.

It is an amenable number.

670261 is a deficient number, since it is larger than the sum of its proper divisors (1).

670261 is an equidigital number, since it uses as much as digits as its factorization.

670261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 670261 is about 818.6946927885. The cubic root of 670261 is about 87.5147621352.

The spelling of 670261 in words is "six hundred seventy thousand, two hundred sixty-one".