140125621 has 4 divisors (see below), whose sum is σ = 140166892. Its totient is φ = 140084352.

The previous prime is 140125613. The next prime is 140125631. The reversal of 140125621 is 126521041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 126521041 = 467 ⋅270923.

It can be written as a sum of positive squares in 2 ways, for example, as 68062500 + 72063121 = 8250^2 + 8489^2 .

It is a cyclic number.

It is not a de Polignac number, because 140125621 - 2³ = 140125613 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140125592 and 140125601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140125631) 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 3 ways as a sum of consecutive naturals, for example, 15036 + ... + 22501.

It is an arithmetic number, because the mean of its divisors is an integer number (35041723).

Almost surely, 2^140125621 is an apocalyptic number.

It is an amenable number.

140125621 is a deficient number, since it is larger than the sum of its proper divisors (41271).

140125621 is an equidigital number, since it uses as much as digits as its factorization.

140125621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41270.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 140125621 is about 11837.4668320549. The cubic root of 140125621 is about 519.4046700188.

Adding to 140125621 its reverse (126521041), we get a palindrome (266646662).

The spelling of 140125621 in words is "one hundred forty million, one hundred twenty-five thousand, six hundred twenty-one".