140236621 has 16 divisors (see below), whose sum is σ = 172488960. Its totient is φ = 111271680.

The previous prime is 140236609. The next prime is 140236627. The reversal of 140236621 is 126632041.

It is a cyclic number.

It is not a de Polignac number, because 140236621 - 2²⁵ = 106682189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140236627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2401 + ... + 16918.

It is an arithmetic number, because the mean of its divisors is an integer number (10780560).

Almost surely, 2^140236621 is an apocalyptic number.

It is an amenable number.

140236621 is a deficient number, since it is larger than the sum of its proper divisors (32252339).

140236621 is a wasteful number, since it uses less digits than its factorization.

140236621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19404.

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

The square root of 140236621 is about 11842.1544070325. The cubic root of 140236621 is about 519.5417819931.

Adding to 140236621 its reverse (126632041), we get a palindrome (266868662).

The spelling of 140236621 in words is "one hundred forty million, two hundred thirty-six thousand, six hundred twenty-one".