140524981 has 4 divisors (see below), whose sum is σ = 145370700. Its totient is φ = 135679264.

The previous prime is 140524957. The next prime is 140525017. The reversal of 140524981 is 189425041.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 82628100 + 57896881 = 9090^2 + 7609^2 .

It is a cyclic number.

It is not a de Polignac number, because 140524981 - 2⁹ = 140524469 is a prime.

It is a super-2 number, since 2×140524981² = 39494540570100722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140524921) 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 in 3 ways as a sum of consecutive naturals, for example, 2422816 + ... + 2422873.

It is an arithmetic number, because the mean of its divisors is an integer number (36342675).

Almost surely, 2^140524981 is an apocalyptic number.

It is an amenable number.

140524981 is a deficient number, since it is larger than the sum of its proper divisors (4845719).

140524981 is an equidigital number, since it uses as much as digits as its factorization.

140524981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4845718.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 140524981 is about 11854.3233041789. The cubic root of 140524981 is about 519.8976388754.

The spelling of 140524981 in words is "one hundred forty million, five hundred twenty-four thousand, nine hundred eighty-one".