140267921 has 2 divisors, whose sum is σ = 140267922. Its totient is φ = 140267920.

The previous prime is 140267909. The next prime is 140267923. The reversal of 140267921 is 129762041.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136422400 + 3845521 = 11680^2 + 1961^2 .

It is a cyclic number.

It is not a de Polignac number, because 140267921 - 2¹⁰ = 140266897 is a prime.

Together with 140267923, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (140267923) 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 as a sum of consecutive naturals, namely, 70133960 + 70133961.

It is an arithmetic number, because the mean of its divisors is an integer number (70133961).

Almost surely, 2^140267921 is an apocalyptic number.

It is an amenable number.

140267921 is a deficient number, since it is larger than the sum of its proper divisors (1).

140267921 is an equidigital number, since it uses as much as digits as its factorization.

140267921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 140267921 is about 11843.4758833714. The cubic root of 140267921 is about 519.5804320213.

The spelling of 140267921 in words is "one hundred forty million, two hundred sixty-seven thousand, nine hundred twenty-one".