140720420 has 12 divisors (see below), whose sum is σ = 295512924. Its totient is φ = 56288160.

The previous prime is 140720413. The next prime is 140720423. The reversal of 140720420 is 24027041.

It can be written as a sum of positive squares in 2 ways, for example, as 26956864 + 113763556 = 5192^2 + 10666^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 7036021 = 140720420 / (1 + 4 + 0 + 7 + 2 + 0 + 4 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 140720392 and 140720401.

It is not an unprimeable number, because it can be changed into a prime (140720423) 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, 3517991 + ... + 3518030.

It is an arithmetic number, because the mean of its divisors is an integer number (24626077).

Almost surely, 2^140720420 is an apocalyptic number.

140720420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140720420 is an abundant number, since it is smaller than the sum of its proper divisors (154792504).

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

140720420 is a wasteful number, since it uses less digits than its factorization.

140720420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7036030 (or 7036028 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 140720420 is about 11862.5638038326. The cubic root of 140720420 is about 520.1385478949.

Adding to 140720420 its reverse (24027041), we get a palindrome (164747461).

The spelling of 140720420 in words is "one hundred forty million, seven hundred twenty thousand, four hundred twenty".