140681000 has 32 divisors (see below), whose sum is σ = 329195880. Its totient is φ = 56272000.

The previous prime is 140680999. The next prime is 140681071. The reversal of 140681000 is 186041.

It can be written as a sum of positive squares in 4 ways, for example, as 8844676 + 131836324 = 2974^2 + 11482^2 .

It is a super-2 number, since 2×140681000² = 39582287522000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69341 + ... + 71340.

Almost surely, 2^140681000 is an apocalyptic number.

140681000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140681000 is an abundant number, since it is smaller than the sum of its proper divisors (188514880).

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

140681000 is a wasteful number, since it uses less digits than its factorization.

140681000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140702 (or 140688 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 140681000 is about 11860.9021579305. The cubic root of 140681000 is about 520.0899745690.

The spelling of 140681000 in words is "one hundred forty million, six hundred eighty-one thousand".