140469421 has 2 divisors, whose sum is σ = 140469422. Its totient is φ = 140469420.

The previous prime is 140469391. The next prime is 140469431. The reversal of 140469421 is 124964041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126112900 + 14356521 = 11230^2 + 3789^2 .

It is an emirp because it is prime and its reverse (124964041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140469421 - 2¹³ = 140461229 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140469431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70234710 + 70234711.

It is an arithmetic number, because the mean of its divisors is an integer number (70234711).

Almost surely, 2^140469421 is an apocalyptic number.

It is an amenable number.

140469421 is a deficient number, since it is larger than the sum of its proper divisors (1).

140469421 is an equidigital number, since it uses as much as digits as its factorization.

140469421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 140469421 is about 11851.9796236747. The cubic root of 140469421 is about 519.8291117463.

The spelling of 140469421 in words is "one hundred forty million, four hundred sixty-nine thousand, four hundred twenty-one".