140221905 has 8 divisors (see below), whose sum is σ = 224355072. Its totient is φ = 74785008.

The previous prime is 140221901. The next prime is 140221951. The reversal of 140221905 is 509122041.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 140221905 - 2² = 140221901 is a prime.

It is not an unprimeable number, because it can be changed into a prime (140221901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4674049 + ... + 4674078.

It is an arithmetic number, because the mean of its divisors is an integer number (28044384).

Almost surely, 2^140221905 is an apocalyptic number.

140221905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

140221905 is a deficient number, since it is larger than the sum of its proper divisors (84133167).

140221905 is an equidigital number, since it uses as much as digits as its factorization.

140221905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9348135.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 140221905 is about 11841.5330510876. The cubic root of 140221905 is about 519.5236083181.

Adding to 140221905 its reverse (509122041), we get a palindrome (649343946).

The spelling of 140221905 in words is "one hundred forty million, two hundred twenty-one thousand, nine hundred five".