140521547 has 2 divisors, whose sum is σ = 140521548. Its totient is φ = 140521546.

The previous prime is 140521519. The next prime is 140521571. The reversal of 140521547 is 745125041.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 140521547 - 2¹⁴ = 140505163 is a prime.

It is not a weakly prime, because it can be changed into another prime (140521517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70260773 + 70260774.

It is an arithmetic number, because the mean of its divisors is an integer number (70260774).

Almost surely, 2^140521547 is an apocalyptic number.

140521547 is a deficient number, since it is larger than the sum of its proper divisors (1).

140521547 is an equidigital number, since it uses as much as digits as its factorization.

140521547 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 140521547 is about 11854.1784616227. The cubic root of 140521547 is about 519.8934039391.

Adding to 140521547 its reverse (745125041), we get a palindrome (885646588).

The spelling of 140521547 in words is "one hundred forty million, five hundred twenty-one thousand, five hundred forty-seven".