140154021 has 12 divisors (see below), whose sum is σ = 231365472. Its totient is φ = 80087976.

The previous prime is 140153971. The next prime is 140154029. The reversal of 140154021 is 120451041.

It is not a de Polignac number, because 140154021 - 2⁹ = 140153509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 140153985 and 140154003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140154029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1112271 + ... + 1112396.

It is an arithmetic number, because the mean of its divisors is an integer number (19280456).

Almost surely, 2^140154021 is an apocalyptic number.

It is an amenable number.

140154021 is a deficient number, since it is larger than the sum of its proper divisors (91211451).

140154021 is a wasteful number, since it uses less digits than its factorization.

140154021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2224680 (or 2224677 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 140154021 is about 11838.6663522544. Note that the first 3 decimals coincide. The cubic root of 140154021 is about 519.4397578114.

The spelling of 140154021 in words is "one hundred forty million, one hundred fifty-four thousand, twenty-one".