140021453 has 8 divisors (see below), whose sum is σ = 164500896. Its totient is φ = 117500400.

The previous prime is 140021449. The next prime is 140021461. The reversal of 140021453 is 354120041.

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

It is a cyclic number.

It is not a de Polignac number, because 140021453 - 2² = 140021449 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 (140021423) 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 7 ways as a sum of consecutive naturals, for example, 489443 + ... + 489728.

It is an arithmetic number, because the mean of its divisors is an integer number (20562612).

Almost surely, 2^140021453 is an apocalyptic number.

140021453 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

140021453 is a deficient number, since it is larger than the sum of its proper divisors (24479443).

140021453 is a wasteful number, since it uses less digits than its factorization.

140021453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 979195.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 140021453 is about 11833.0660861841. The cubic root of 140021453 is about 519.2759313486.

Adding to 140021453 its reverse (354120041), we get a palindrome (494141494).

The spelling of 140021453 in words is "one hundred forty million, twenty-one thousand, four hundred fifty-three".