140009421 has 8 divisors (see below), whose sum is σ = 186928864. Its totient is φ = 93214800.

The previous prime is 140009417. The next prime is 140009437. The reversal of 140009421 is 124900041.

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

It is not a de Polignac number, because 140009421 - 2² = 140009417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140009491) 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, 28555 + ... + 33096.

It is an arithmetic number, because the mean of its divisors is an integer number (23366108).

Almost surely, 2^140009421 is an apocalyptic number.

It is an amenable number.

140009421 is a deficient number, since it is larger than the sum of its proper divisors (46919443).

140009421 is an equidigital number, since it uses as much as digits as its factorization.

140009421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62411.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 140009421 is about 11832.5576694137. The cubic root of 140009421 is about 519.2610571827.

Adding to 140009421 its reverse (124900041), we get a palindrome (264909462).

The spelling of 140009421 in words is "one hundred forty million, nine thousand, four hundred twenty-one".