247127242 has 4 divisors (see below), whose sum is σ = 370690866. Its totient is φ = 123563620.

The previous prime is 247127239. The next prime is 247127267. The reversal of 247127242 is 242721742.

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., 141633801 + 105493441 = 11901^2 + 10271^2 .

It is a super-2 number, since 2×247127242² = 122143747477053128, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

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, 61781809 + ... + 61781812.

Almost surely, 2^247127242 is an apocalyptic number.

247127242 is a deficient number, since it is larger than the sum of its proper divisors (123563624).

247127242 is a wasteful number, since it uses less digits than its factorization.

247127242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123563623.

The product of its digits is 12544, while the sum is 31.

The square root of 247127242 is about 15720.2812315811. The cubic root of 247127242 is about 627.5382574834.

Adding to 247127242 its reverse (242721742), we get a palindrome (489848984).

The spelling of 247127242 in words is "two hundred forty-seven million, one hundred twenty-seven thousand, two hundred forty-two".