245549 has 8 divisors (see below), whose sum is σ = 258552. Its totient is φ = 232960.

The previous prime is 245533. The next prime is 245561. The reversal of 245549 is 945542.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2500 + 243049 = 50^2 + 493^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 245549 - 2⁴ = 245533 is a prime.

It is a super-2 number, since 2×245549² = 120588622802, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 245549.

It is not an unprimeable number, because it can be changed into a prime (245519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2117 + ... + 2229.

It is an arithmetic number, because the mean of its divisors is an integer number (32319).

2²⁴⁵⁵⁴⁹ is an apocalyptic number.

It is an amenable number.

245549 is a deficient number, since it is larger than the sum of its proper divisors (13003).

245549 is a wasteful number, since it uses less digits than its factorization.

245549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207.

The product of its digits is 7200, while the sum is 29.

The square root of 245549 is about 495.5290102507. The cubic root of 245549 is about 62.6199509743.

It can be divided in two parts, 2455 and 49, that multiplied together give a triangular number (120295 = T₄₉₀).

The spelling of 245549 in words is "two hundred forty-five thousand, five hundred forty-nine".