140621291 has 2 divisors, whose sum is σ = 140621292. Its totient is φ = 140621290.

The previous prime is 140621281. The next prime is 140621293. The reversal of 140621291 is 192126041.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 140621291 - 2¹⁴ = 140604907 is a prime.

Together with 140621293, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 140621291.

It is not a weakly prime, because it can be changed into another prime (140621293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70310645 + 70310646.

It is an arithmetic number, because the mean of its divisors is an integer number (70310646).

Almost surely, 2^140621291 is an apocalyptic number.

140621291 is a deficient number, since it is larger than the sum of its proper divisors (1).

140621291 is an equidigital number, since it uses as much as digits as its factorization.

140621291 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 140621291 is about 11858.3848394290. The cubic root of 140621291 is about 520.0163838526.

The spelling of 140621291 in words is "one hundred forty million, six hundred twenty-one thousand, two hundred ninety-one".