140956821 has 16 divisors (see below), whose sum is σ = 209059200. Its totient is φ = 93865824.

The previous prime is 140956819. The next prime is 140956847. The reversal of 140956821 is 128659041.

It is not a de Polignac number, because 140956821 - 2¹ = 140956819 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140956891) 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 in 15 ways as a sum of consecutive naturals, for example, 27240 + ... + 31998.

It is an arithmetic number, because the mean of its divisors is an integer number (13066200).

Almost surely, 2^140956821 is an apocalyptic number.

It is an amenable number.

140956821 is a deficient number, since it is larger than the sum of its proper divisors (68102379).

140956821 is a wasteful number, since it uses less digits than its factorization.

140956821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5865 (or 5859 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 140956821 is about 11872.5237839307. The cubic root of 140956821 is about 520.4296510659.

The spelling of 140956821 in words is "one hundred forty million, nine hundred fifty-six thousand, eight hundred twenty-one".