140263621 has 4 divisors (see below), whose sum is σ = 140510700. Its totient is φ = 140016544.

The previous prime is 140263601. The next prime is 140263639. The reversal of 140263621 is 126362041.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18404100 + 121859521 = 4290^2 + 11039^2 .

It is a cyclic number.

It is not a de Polignac number, because 140263621 - 2¹⁷ = 140132549 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 (140263601) 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, 122686 + ... + 123823.

It is an arithmetic number, because the mean of its divisors is an integer number (35127675).

Almost surely, 2^140263621 is an apocalyptic number.

It is an amenable number.

140263621 is a deficient number, since it is larger than the sum of its proper divisors (247079).

140263621 is an equidigital number, since it uses as much as digits as its factorization.

140263621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247078.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 140263621 is about 11843.2943474356. The cubic root of 140263621 is about 519.5751226137.

The spelling of 140263621 in words is "one hundred forty million, two hundred sixty-three thousand, six hundred twenty-one".