249061 has 4 divisors (see below), whose sum is σ = 250272. Its totient is φ = 247852.

The previous prime is 249059. The next prime is 249079. The reversal of 249061 is 160942.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 160942 = 2 ⋅80471.

It is a cyclic number.

It is not a de Polignac number, because 249061 - 2¹ = 249059 is a prime.

It is an Ulam number.

It is a Duffinian number.

249061 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (241061) 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, 211 + ... + 736.

It is an arithmetic number, because the mean of its divisors is an integer number (62568).

2²⁴⁹⁰⁶¹ is an apocalyptic number.

It is an amenable number.

249061 is a deficient number, since it is larger than the sum of its proper divisors (1211).

249061 is an equidigital number, since it uses as much as digits as its factorization.

249061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1210.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 249061 is about 499.0601166192. The cubic root of 249061 is about 62.9170824839.

The spelling of 249061 in words is "two hundred forty-nine thousand, sixty-one".