140355021 has 4 divisors (see below), whose sum is σ = 187140032. Its totient is φ = 93570012.

The previous prime is 140354989. The next prime is 140355029. The reversal of 140355021 is 120553041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 140355021 - 2⁵ = 140354989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140355029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23392501 + ... + 23392506.

It is an arithmetic number, because the mean of its divisors is an integer number (46785008).

Almost surely, 2^140355021 is an apocalyptic number.

It is an amenable number.

140355021 is a deficient number, since it is larger than the sum of its proper divisors (46785011).

140355021 is an equidigital number, since it uses as much as digits as its factorization.

140355021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46785010.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 140355021 is about 11847.1524426758. The cubic root of 140355021 is about 519.6879550419.

The spelling of 140355021 in words is "one hundred forty million, three hundred fifty-five thousand, twenty-one".