609251 has 4 divisors (see below), whose sum is σ = 617904. Its totient is φ = 600600.

The previous prime is 609241. The next prime is 609253. The reversal of 609251 is 152906.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-609251 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 609251.

It is not an unprimeable number, because it can be changed into a prime (609253) 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 3 ways as a sum of consecutive naturals, for example, 4220 + ... + 4361.

It is an arithmetic number, because the mean of its divisors is an integer number (154476).

2⁶⁰⁹²⁵¹ is an apocalyptic number.

609251 is a deficient number, since it is larger than the sum of its proper divisors (8653).

609251 is an equidigital number, since it uses as much as digits as its factorization.

609251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8652.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 609251 is about 780.5453221947. The cubic root of 609251 is about 84.7745351182.

The spelling of 609251 in words is "six hundred nine thousand, two hundred fifty-one".