140495021 has 8 divisors (see below), whose sum is σ = 149003064. Its totient is φ = 132014080.

The previous prime is 140494999. The next prime is 140495023. The reversal of 140495021 is 120594041.

It can be written as a sum of positive squares in 4 ways, for example, as 75933796 + 64561225 = 8714^2 + 8035^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140495021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140495023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4451 + ... + 17343.

It is an arithmetic number, because the mean of its divisors is an integer number (18625383).

Almost surely, 2^140495021 is an apocalyptic number.

It is an amenable number.

140495021 is a deficient number, since it is larger than the sum of its proper divisors (8508043).

140495021 is a wasteful number, since it uses less digits than its factorization.

140495021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13551.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 140495021 is about 11853.0595628302. The cubic root of 140495021 is about 519.8606887658.

The spelling of 140495021 in words is "one hundred forty million, four hundred ninety-five thousand, twenty-one".