140520497 has 4 divisors (see below), whose sum is σ = 151329780. Its totient is φ = 129711216.

The previous prime is 140520493. The next prime is 140520529. The reversal of 140520497 is 794025041.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 794025041 = 31 ⋅25613711.

It can be written as a sum of positive squares in 2 ways, for example, as 94497841 + 46022656 = 9721^2 + 6784^2 .

It is a cyclic number.

It is not a de Polignac number, because 140520497 - 2² = 140520493 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140520493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5404622 + ... + 5404647.

It is an arithmetic number, because the mean of its divisors is an integer number (37832445).

Almost surely, 2^140520497 is an apocalyptic number.

It is an amenable number.

140520497 is a deficient number, since it is larger than the sum of its proper divisors (10809283).

140520497 is a wasteful number, since it uses less digits than its factorization.

140520497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10809282.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 140520497 is about 11854.1341733591. The cubic root of 140520497 is about 519.8921090263.

The spelling of 140520497 in words is "one hundred forty million, five hundred twenty thousand, four hundred ninety-seven".