249478 has 4 divisors (see below), whose sum is σ = 374220. Its totient is φ = 124738.

The previous prime is 249463. The next prime is 249497. The reversal of 249478 is 874942.

It is a happy number.

249478 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 874942 = 2 ⋅437471.

It is a d-powerful number, because it can be written as 2¹⁷ + 4 + 4² + 9³ + 7⁶ + 8 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62368 + ... + 62371.

It is an arithmetic number, because the mean of its divisors is an integer number (93555).

2²⁴⁹⁴⁷⁸ is an apocalyptic number.

249478 is a deficient number, since it is larger than the sum of its proper divisors (124742).

249478 is a wasteful number, since it uses less digits than its factorization.

249478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124741.

The product of its digits is 16128, while the sum is 34.

The square root of 249478 is about 499.4777272312. The cubic root of 249478 is about 62.9521766905.

It can be divided in two parts, 249 and 478, that added together give a palindrome (727).

The spelling of 249478 in words is "two hundred forty-nine thousand, four hundred seventy-eight".