249029842 has 16 divisors (see below), whose sum is σ = 377925912. Its totient is φ = 123059200.

The previous prime is 249029839. The next prime is 249029843. The reversal of 249029842 is 248920942.

It can be written as a sum of positive squares in 4 ways, for example, as 180123241 + 68906601 = 13421^2 + 8301^2 .

It is a junction number, because it is equal to n+sod(n) for n = 249029795 and 249029804.

It is not an unprimeable number, because it can be changed into a prime (249029843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204018 + ... + 205234.

Almost surely, 2^249029842 is an apocalyptic number.

249029842 is a deficient number, since it is larger than the sum of its proper divisors (128896070).

249029842 is a wasteful number, since it uses less digits than its factorization.

249029842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2333.

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 249029842 is about 15780.6793896841. The cubic root of 249029842 is about 629.1445869265.

Subtracting from 249029842 its reverse (248920942), we obtain a square (108900 = 330²).

The spelling of 249029842 in words is "two hundred forty-nine million, twenty-nine thousand, eight hundred forty-two".