140782261 has 2 divisors, whose sum is σ = 140782262. Its totient is φ = 140782260.

The previous prime is 140782231. The next prime is 140782273. The reversal of 140782261 is 162287041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85562500 + 55219761 = 9250^2 + 7431^2 .

It is a cyclic number.

It is not a de Polignac number, because 140782261 - 2¹⁵ = 140749493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140782231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70391130 + 70391131.

It is an arithmetic number, because the mean of its divisors is an integer number (70391131).

Almost surely, 2^140782261 is an apocalyptic number.

It is an amenable number.

140782261 is a deficient number, since it is larger than the sum of its proper divisors (1).

140782261 is an equidigital number, since it uses as much as digits as its factorization.

140782261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 140782261 is about 11865.1700788484. The cubic root of 140782261 is about 520.2147301036.

The spelling of 140782261 in words is "one hundred forty million, seven hundred eighty-two thousand, two hundred sixty-one".