681154000 has 40 divisors (see below), whose sum is σ = 1647035208. Its totient is φ = 272460800.

The previous prime is 681153973. The next prime is 681154027. The reversal of 681154000 is 451186.

It is an interprime number because it is at equal distance from previous prime (681153973) and next prime (681154027).

It can be written as a sum of positive squares in 4 ways, for example, as 203119504 + 478034496 = 14252^2 + 21864^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 168289 + ... + 172288.

Almost surely, 2^681154000 is an apocalyptic number.

It is an amenable number.

681154000 is an abundant number, since it is smaller than the sum of its proper divisors (965881208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

681154000 is a wasteful number, since it uses less digits than its factorization.

681154000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340600 (or 340584 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 681154000 is about 26098.9271810165. The cubic root of 681154000 is about 879.8630985381.

The spelling of 681154000 in words is "six hundred eighty-one million, one hundred fifty-four thousand".