140519021 has 2 divisors, whose sum is σ = 140519022. Its totient is φ = 140519020.

The previous prime is 140518999. The next prime is 140519039. The reversal of 140519021 is 120915041.

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., 87796900 + 52722121 = 9370^2 + 7261^2 .

It is a cyclic number.

It is not a de Polignac number, because 140519021 - 2¹⁸ = 140256877 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 (140519221) 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, 70259510 + 70259511.

It is an arithmetic number, because the mean of its divisors is an integer number (70259511).

Almost surely, 2^140519021 is an apocalyptic number.

It is an amenable number.

140519021 is a deficient number, since it is larger than the sum of its proper divisors (1).

140519021 is an equidigital number, since it uses as much as digits as its factorization.

140519021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 140519021 is about 11854.0719164345. The cubic root of 140519021 is about 519.8902887380.

The spelling of 140519021 in words is "one hundred forty million, five hundred nineteen thousand, twenty-one".