140421240 has 96 divisors (see below), whose sum is σ = 459360720. Its totient is φ = 37200384.

The previous prime is 140421217. The next prime is 140421283. The reversal of 140421240 is 42124041.

140421240 is a `hidden beast` number, since 1 + 4 + 0 + 421 + 240 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57484 + ... + 59876.

Almost surely, 2^140421240 is an apocalyptic number.

140421240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 140421240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (229680360).

140421240 is an abundant number, since it is smaller than the sum of its proper divisors (318939480).

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

140421240 is a wasteful number, since it uses less digits than its factorization.

140421240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2573 (or 2566 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 140421240 is about 11849.9468353238. The cubic root of 140421240 is about 519.7696711687.

Adding to 140421240 its reverse (42124041), we get a palindrome (182545281).

The spelling of 140421240 in words is "one hundred forty million, four hundred twenty-one thousand, two hundred forty".