247706042 has 4 divisors (see below), whose sum is σ = 371559066. Its totient is φ = 123853020.

The previous prime is 247706033. The next prime is 247706077. The reversal of 247706042 is 240607742.

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., 235039561 + 12666481 = 15331^2 + 3559^2 .

It is a super-2 number, since 2×247706042² = 122716566486611528, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61926509 + ... + 61926512.

Almost surely, 2^247706042 is an apocalyptic number.

247706042 is a deficient number, since it is larger than the sum of its proper divisors (123853024).

247706042 is a wasteful number, since it uses less digits than its factorization.

247706042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123853023.

The product of its (nonzero) digits is 18816, while the sum is 32.

The square root of 247706042 is about 15738.6798048629. The cubic root of 247706042 is about 628.0277973956.

The spelling of 247706042 in words is "two hundred forty-seven million, seven hundred six thousand, forty-two".