140815261 has 2 divisors, whose sum is σ = 140815262. Its totient is φ = 140815260.

The previous prime is 140815249. The next prime is 140815273. The reversal of 140815261 is 162518041.

140815261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (140815249) and next prime (140815273).

It can be written as a sum of positive squares in only one way, i.e., 71825625 + 68989636 = 8475^2 + 8306^2 .

It is a cyclic number.

It is not a de Polignac number, because 140815261 - 2¹¹ = 140813213 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 (140815231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70407630 + 70407631.

It is an arithmetic number, because the mean of its divisors is an integer number (70407631).

Almost surely, 2^140815261 is an apocalyptic number.

It is an amenable number.

140815261 is a deficient number, since it is larger than the sum of its proper divisors (1).

140815261 is an equidigital number, since it uses as much as digits as its factorization.

140815261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 140815261 is about 11866.5606221854. The cubic root of 140815261 is about 520.2553738248.

The spelling of 140815261 in words is "one hundred forty million, eight hundred fifteen thousand, two hundred sixty-one".