140649 has 8 divisors (see below), whose sum is σ = 189312. Its totient is φ = 92880.

The previous prime is 140639. The next prime is 140659. The reversal of 140649 is 946041.

It is an interprime number because it is at equal distance from previous prime (140639) and next prime (140659).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 140649 - 2⁵ = 140617 is a prime.

It is a super-3 number, since 3×140649³ = 8347015133338347, which contains 333 as substring.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 16.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 140649.

It is not an unprimeable number, because it can be changed into a prime (140629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 384 + ... + 654.

It is an arithmetic number, because the mean of its divisors is an integer number (23664).

2¹⁴⁰⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

140649 is a deficient number, since it is larger than the sum of its proper divisors (48663).

140649 is a wasteful number, since it uses less digits than its factorization.

140649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 140649 is about 375.0319986348. The cubic root of 140649 is about 52.0050537495.

Subtracting from 140649 its sum of digits (24), we obtain a square (140625 = 375²).

The spelling of 140649 in words is "one hundred forty thousand, six hundred forty-nine".