681458271 has 16 divisors (see below), whose sum is σ = 988597344. Its totient is φ = 415033344.

The previous prime is 681458249. The next prime is 681458293. The reversal of 681458271 is 172854186.

It is an interprime number because it is at equal distance from previous prime (681458249) and next prime (681458293).

It is not a de Polignac number, because 681458271 - 2⁷ = 681458143 is a prime.

It is a super-2 number, since 2×681458271² = 928770750228618882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681458221) by changing a digit.

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, 86286 + ... + 93851.

It is an arithmetic number, because the mean of its divisors is an integer number (61787334).

Almost surely, 2^681458271 is an apocalyptic number.

681458271 is a deficient number, since it is larger than the sum of its proper divisors (307139073).

681458271 is a wasteful number, since it uses less digits than its factorization.

681458271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180250.

The product of its digits is 107520, while the sum is 42.

The square root of 681458271 is about 26104.7557161526. The cubic root of 681458271 is about 879.9940904390.

The spelling of 681458271 in words is "six hundred eighty-one million, four hundred fifty-eight thousand, two hundred seventy-one".