140969 has 4 divisors (see below), whose sum is σ = 145860. Its totient is φ = 136080.

The previous prime is 140939. The next prime is 140977. The reversal of 140969 is 969041.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 105625 + 35344 = 325^2 + 188^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140969 is a prime.

It is a super-2 number, since 2×140969² = 39744517922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 4861 = 140969 / (1 + 4 + 0 + 9 + 6 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2402 + ... + 2459.

It is an arithmetic number, because the mean of its divisors is an integer number (36465).

2¹⁴⁰⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

140969 is a deficient number, since it is larger than the sum of its proper divisors (4891).

140969 is an equidigital number, since it uses as much as digits as its factorization.

140969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4890.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 140969 is about 375.4583865091. The cubic root of 140969 is about 52.0444639415.

The spelling of 140969 in words is "one hundred forty thousand, nine hundred sixty-nine".