247242086 has 32 divisors (see below), whose sum is σ = 457262400. Its totient is φ = 97635456.

The previous prime is 247242059. The next prime is 247242091. The reversal of 247242086 is 680242742.

It is a happy number.

It is a super-2 number, since 2×247242086² = 122257298179262792, which contains 22 as substring.

It is a Curzon number.

It is a congruent 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 in 15 ways as a sum of consecutive naturals, for example, 158840 + ... + 160388.

It is an arithmetic number, because the mean of its divisors is an integer number (14289450).

Almost surely, 2^247242086 is an apocalyptic number.

247242086 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

247242086 is a deficient number, since it is larger than the sum of its proper divisors (210020314).

247242086 is a wasteful number, since it uses less digits than its factorization.

247242086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2448.

The product of its (nonzero) digits is 43008, while the sum is 35.

The square root of 247242086 is about 15723.9335409432. The cubic root of 247242086 is about 627.6354514661.

The spelling of 247242086 in words is "two hundred forty-seven million, two hundred forty-two thousand, eighty-six".