140735521 has 8 divisors (see below), whose sum is σ = 147033000. Its totient is φ = 134534400.

The previous prime is 140735509. The next prime is 140735533. The reversal of 140735521 is 125537041.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (140735509) and next prime (140735533).

It can be written as a sum of positive squares in 4 ways, for example, as 26010000 + 114725521 = 5100^2 + 10711^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 140735521 - 2⁷ = 140735393 is a prime.

It is a super-2 number, since 2×140735521² = 39612973742282882, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 140735521.

It is not an unprimeable number, because it can be changed into a prime (140715521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21096 + ... + 26953.

It is an arithmetic number, because the mean of its divisors is an integer number (18379125).

Almost surely, 2^140735521 is an apocalyptic number.

It is an amenable number.

140735521 is a deficient number, since it is larger than the sum of its proper divisors (6297479).

140735521 is a wasteful number, since it uses less digits than its factorization.

140735521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48179.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 140735521 is about 11863.2002849147. The cubic root of 140735521 is about 520.1571529447.

The spelling of 140735521 in words is "one hundred forty million, seven hundred thirty-five thousand, five hundred twenty-one".