140021020 has 12 divisors (see below), whose sum is σ = 294044184. Its totient is φ = 56008400.

The previous prime is 140021003. The next prime is 140021023. The reversal of 140021020 is 20120041.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 140020988 and 140021006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140021023) 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 3 ways as a sum of consecutive naturals, for example, 3500506 + ... + 3500545.

It is an arithmetic number, because the mean of its divisors is an integer number (24503682).

Almost surely, 2^140021020 is an apocalyptic number.

140021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140021020 is an abundant number, since it is smaller than the sum of its proper divisors (154023164).

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

140021020 is a wasteful number, since it uses less digits than its factorization.

140021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7001060 (or 7001058 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 140021020 is about 11833.0477899821. The cubic root of 140021020 is about 519.2753960813.

Adding to 140021020 its reverse (20120041), we get a palindrome (160141061).

The spelling of 140021020 in words is "one hundred forty million, twenty-one thousand, twenty".