140533021 has 4 divisors (see below), whose sum is σ = 142312000. Its totient is φ = 138754044.

The previous prime is 140532991. The next prime is 140533037. The reversal of 140533021 is 120335041.

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 a cyclic number.

It is not a de Polignac number, because 140533021 - 2⁷ = 140532893 is a prime.

It is a super-3 number, since 3×140533021³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 140533021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140533061) 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, 889371 + ... + 889528.

It is an arithmetic number, because the mean of its divisors is an integer number (35578000).

Almost surely, 2^140533021 is an apocalyptic number.

It is an amenable number.

140533021 is a deficient number, since it is larger than the sum of its proper divisors (1778979).

140533021 is an equidigital number, since it uses as much as digits as its factorization.

140533021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1778978.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 140533021 is about 11854.6624161129. The cubic root of 140533021 is about 519.9075538321.

Adding to 140533021 its reverse (120335041), we get a palindrome (260868062).

The spelling of 140533021 in words is "one hundred forty million, five hundred thirty-three thousand, twenty-one".