824147242 has 4 divisors (see below), whose sum is σ = 1236220866. Its totient is φ = 412073620.

The previous prime is 824147231. The next prime is 824147243. The reversal of 824147242 is 242741428.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 621056241 + 203091001 = 24921^2 + 14251^2 .

It is a junction number, because it is equal to n+sod(n) for n = 824147198 and 824147207.

It is not an unprimeable number, because it can be changed into a prime (824147243) 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 as a sum of consecutive naturals, namely, 206036809 + ... + 206036812.

Almost surely, 2^824147242 is an apocalyptic number.

824147242 is a deficient number, since it is larger than the sum of its proper divisors (412073624).

824147242 is a wasteful number, since it uses less digits than its factorization.

824147242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412073623.

The product of its digits is 28672, while the sum is 34.

The square root of 824147242 is about 28707.9647833141. The cubic root of 824147242 is about 937.5654679496.

The spelling of 824147242 in words is "eight hundred twenty-four million, one hundred forty-seven thousand, two hundred forty-two".