140520420 has 120 divisors (see below), whose sum is σ = 444939264. Its totient is φ = 37122624.

The previous prime is 140520397. The next prime is 140520421. The reversal of 140520420 is 24025041.

140520420 is a `hidden beast` number, since 140 + 520 + 4 + 2 + 0 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 140520393 and 140520402.

It is not an unprimeable number, because it can be changed into a prime (140520421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 205399 + ... + 206081.

Almost surely, 2^140520420 is an apocalyptic number.

140520420 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 140520420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222469632).

140520420 is an abundant number, since it is smaller than the sum of its proper divisors (304418844).

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

140520420 is a wasteful number, since it uses less digits than its factorization.

140520420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831 (or 820 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 140520420 is about 11854.1309255466. The cubic root of 140520420 is about 519.8920140658.

Adding to 140520420 its reverse (24025041), we get a palindrome (164545461).

The spelling of 140520420 in words is "one hundred forty million, five hundred twenty thousand, four hundred twenty".