140031021 has 8 divisors (see below), whose sum is σ = 201070240. Its totient is φ = 86172912.

The previous prime is 140031019. The next prime is 140031029. The reversal of 140031021 is 120130041.

It is a happy number.

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

It is not a de Polignac number, because 140031021 - 2¹ = 140031019 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 140030988 and 140031006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140031029) 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, 1795231 + ... + 1795308.

It is an arithmetic number, because the mean of its divisors is an integer number (25133780).

Almost surely, 2^140031021 is an apocalyptic number.

It is an amenable number.

140031021 is a deficient number, since it is larger than the sum of its proper divisors (61039219).

140031021 is a wasteful number, since it uses less digits than its factorization.

140031021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3590555.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 140031021 is about 11833.4703700985. The cubic root of 140031021 is about 519.2877588670.

Adding to 140031021 its reverse (120130041), we get a palindrome (260161062).

The spelling of 140031021 in words is "one hundred forty million, thirty-one thousand, twenty-one".