140581501 has 2 divisors, whose sum is σ = 140581502. Its totient is φ = 140581500.

The previous prime is 140581487. The next prime is 140581523. The reversal of 140581501 is 105185041.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132595225 + 7986276 = 11515^2 + 2826^2 .

It is a cyclic number.

It is not a de Polignac number, because 140581501 - 2⁹ = 140580989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140581541) 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 as a sum of consecutive naturals, namely, 70290750 + 70290751.

It is an arithmetic number, because the mean of its divisors is an integer number (70290751).

Almost surely, 2^140581501 is an apocalyptic number.

It is an amenable number.

140581501 is a deficient number, since it is larger than the sum of its proper divisors (1).

140581501 is an equidigital number, since it uses as much as digits as its factorization.

140581501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 800, while the sum is 25.

The square root of 140581501 is about 11856.7070048981. The cubic root of 140581501 is about 519.9673315276.

The spelling of 140581501 in words is "one hundred forty million, five hundred eighty-one thousand, five hundred one".