140406 has 16 divisors (see below), whose sum is σ = 321024. Its totient is φ = 40104.

The previous prime is 140401. The next prime is 140407. The reversal of 140406 is 604041.

It is a nialpdrome in base 11.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 140406.

It is not an unprimeable number, because it can be changed into a prime (140401) 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, 1630 + ... + 1713.

It is an arithmetic number, because the mean of its divisors is an integer number (20064).

2¹⁴⁰⁴⁰⁶ is an apocalyptic number.

140406 is an abundant number, since it is smaller than the sum of its proper divisors (180618).

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

140406 is a wasteful number, since it uses less digits than its factorization.

140406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3355.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 140406 is about 374.7078862261. The cubic root of 140406 is about 51.9750866852.

Adding to 140406 its reverse (604041), we get a palindrome (744447).

The spelling of 140406 in words is "one hundred forty thousand, four hundred six".