247777042 has 8 divisors (see below), whose sum is σ = 373612032. Its totient is φ = 123239700.

The previous prime is 247777039. The next prime is 247777097. The reversal of 247777042 is 240777742.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×247777042² = 122786925084539528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 247776986 and 247777004.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 323934 + ... + 324697.

It is an arithmetic number, because the mean of its divisors is an integer number (46701504).

Almost surely, 2^247777042 is an apocalyptic number.

247777042 is a deficient number, since it is larger than the sum of its proper divisors (125834990).

247777042 is a wasteful number, since it uses less digits than its factorization.

247777042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648824.

The product of its (nonzero) digits is 153664, while the sum is 40.

The square root of 247777042 is about 15740.9352326982. The cubic root of 247777042 is about 628.0877955473.

The spelling of 247777042 in words is "two hundred forty-seven million, seven hundred seventy-seven thousand, forty-two".