140020420 has 12 divisors (see below), whose sum is σ = 294042924. Its totient is φ = 56008160.

The previous prime is 140020417. The next prime is 140020429. The reversal of 140020420 is 24020041.

140020420 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 55711296 + 84309124 = 7464^2 + 9182^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 140020420.

It is not an unprimeable number, because it can be changed into a prime (140020429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3500491 + ... + 3500530.

It is an arithmetic number, because the mean of its divisors is an integer number (24503577).

Almost surely, 2^140020420 is an apocalyptic number.

140020420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140020420 is an abundant number, since it is smaller than the sum of its proper divisors (154022504).

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

140020420 is a wasteful number, since it uses less digits than its factorization.

140020420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7001030 (or 7001028 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 140020420 is about 11833.0224372305. The cubic root of 140020420 is about 519.2746543696.

Adding to 140020420 its reverse (24020041), we get a palindrome (164040461).

The spelling of 140020420 in words is "one hundred forty million, twenty thousand, four hundred twenty".