140821277 has 2 divisors, whose sum is σ = 140821278. Its totient is φ = 140821276.

The previous prime is 140821273. The next prime is 140821279. The reversal of 140821277 is 772128041.

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., 140801956 + 19321 = 11866^2 + 139^2 .

It is a cyclic number.

It is not a de Polignac number, because 140821277 - 2² = 140821273 is a prime.

Together with 140821279, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140821273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70410638 + 70410639.

It is an arithmetic number, because the mean of its divisors is an integer number (70410639).

Almost surely, 2^140821277 is an apocalyptic number.

It is an amenable number.

140821277 is a deficient number, since it is larger than the sum of its proper divisors (1).

140821277 is an equidigital number, since it uses as much as digits as its factorization.

140821277 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6272, while the sum is 32.

The square root of 140821277 is about 11866.8141048893. The cubic root of 140821277 is about 520.2627826141.

The spelling of 140821277 in words is "one hundred forty million, eight hundred twenty-one thousand, two hundred seventy-seven".