140978 has 4 divisors (see below), whose sum is σ = 211470. Its totient is φ = 70488.

The previous prime is 140977. The next prime is 140983. The reversal of 140978 is 879041.

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

It can be written as a sum of positive squares in only one way, i.e., 139129 + 1849 = 373^2 + 43^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 140978.

It is not an unprimeable number, because it can be changed into a prime (140977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35243 + ... + 35246.

2¹⁴⁰⁹⁷⁸ is an apocalyptic number.

140978 is a deficient number, since it is larger than the sum of its proper divisors (70492).

140978 is an equidigital number, since it uses as much as digits as its factorization.

140978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70491.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 140978 is about 375.4703716673. The cubic root of 140978 is about 52.0455714905.

The spelling of 140978 in words is "one hundred forty thousand, nine hundred seventy-eight".