140912621 has 2 divisors, whose sum is σ = 140912622. Its totient is φ = 140912620.

The previous prime is 140912617. The next prime is 140912657. The reversal of 140912621 is 126219041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138980521 + 1932100 = 11789^2 + 1390^2 .

It is a cyclic number.

It is not a de Polignac number, because 140912621 - 2² = 140912617 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140912671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70456310 + 70456311.

It is an arithmetic number, because the mean of its divisors is an integer number (70456311).

Almost surely, 2^140912621 is an apocalyptic number.

It is an amenable number.

140912621 is a deficient number, since it is larger than the sum of its proper divisors (1).

140912621 is an equidigital number, since it uses as much as digits as its factorization.

140912621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 140912621 is about 11870.6621971986. The cubic root of 140912621 is about 520.3752481284.

The spelling of 140912621 in words is "one hundred forty million, nine hundred twelve thousand, six hundred twenty-one".