140021023 has 2 divisors, whose sum is σ = 140021024. Its totient is φ = 140021022.

The previous prime is 140021003. The next prime is 140021107. The reversal of 140021023 is 320120041.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 140021023 - 2²¹ = 137923871 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 140020994 and 140021012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140021003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70010511 + 70010512.

It is an arithmetic number, because the mean of its divisors is an integer number (70010512).

Almost surely, 2^140021023 is an apocalyptic number.

140021023 is a deficient number, since it is larger than the sum of its proper divisors (1).

140021023 is an equidigital number, since it uses as much as digits as its factorization.

140021023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 140021023 is about 11833.0479167457. The cubic root of 140021023 is about 519.2753997898.

Adding to 140021023 its reverse (320120041), we get a palindrome (460141064).

The spelling of 140021023 in words is "one hundred forty million, twenty-one thousand, twenty-three".