609281 has 4 divisors (see below), whose sum is σ = 614064. Its totient is φ = 604500.

The previous prime is 609277. The next prime is 609283. The reversal of 609281 is 182906.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 182906 = 2 ⋅91453.

It is a cyclic number.

It is not a de Polignac number, because 609281 - 2² = 609277 is a prime.

It is a super-2 number, since 2×609281² = 742446673922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 609281.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 609281.

It is not an unprimeable number, because it can be changed into a prime (609283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2195 + ... + 2456.

It is an arithmetic number, because the mean of its divisors is an integer number (153516).

It is a Proth number, since it is equal to 595 ⋅ 2¹⁰ + 1 and 595 < 2¹⁰.

2⁶⁰⁹²⁸¹ is an apocalyptic number.

It is an amenable number.

609281 is a deficient number, since it is larger than the sum of its proper divisors (4783).

609281 is a wasteful number, since it uses less digits than its factorization.

609281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4782.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 609281 is about 780.5645392919. The cubic root of 609281 is about 84.7759265503.

The spelling of 609281 in words is "six hundred nine thousand, two hundred eighty-one".