140162021 has 2 divisors, whose sum is σ = 140162022. Its totient is φ = 140162020.

The previous prime is 140162003. The next prime is 140162053. The reversal of 140162021 is 120261041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 140161921 + 100 = 11839^2 + 10^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140162021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140162081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70081010 + 70081011.

It is an arithmetic number, because the mean of its divisors is an integer number (70081011).

Almost surely, 2^140162021 is an apocalyptic number.

It is an amenable number.

140162021 is a deficient number, since it is larger than the sum of its proper divisors (1).

140162021 is an equidigital number, since it uses as much as digits as its factorization.

140162021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 140162021 is about 11839.0042233289. The cubic root of 140162021 is about 519.4496408410.

The spelling of 140162021 in words is "one hundred forty million, one hundred sixty-two thousand, twenty-one".