247421306 has 32 divisors (see below), whose sum is σ = 436605120. Its totient is φ = 103939200.

The previous prime is 247421303. The next prime is 247421311. The reversal of 247421306 is 603124742.

It is a super-2 number, since 2×247421306² = 122434605325491272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (247421303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9920 + ... + 24356.

It is an arithmetic number, because the mean of its divisors is an integer number (13643910).

Almost surely, 2^247421306 is an apocalyptic number.

247421306 is a deficient number, since it is larger than the sum of its proper divisors (189183814).

247421306 is a wasteful number, since it uses less digits than its factorization.

247421306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14510.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 247421306 is about 15729.6314642143. The cubic root of 247421306 is about 627.7870675862.

The spelling of 247421306 in words is "two hundred forty-seven million, four hundred twenty-one thousand, three hundred six".