1490457517 has 4 divisors (see below), whose sum is σ = 1490822620. Its totient is φ = 1490092416.

The previous prime is 1490457509. The next prime is 1490457533. The reversal of 1490457517 is 7157540941.

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: 7157540941 = 5021 ⋅1425521.

It can be written as a sum of positive squares in 2 ways, for example, as 373494276 + 1116963241 = 19326^2 + 33421^2 .

It is a cyclic number.

It is not a de Polignac number, because 1490457517 - 2³ = 1490457509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1490457547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176358 + ... + 184615.

It is an arithmetic number, because the mean of its divisors is an integer number (372705655).

Almost surely, 2^1490457517 is an apocalyptic number.

It is an amenable number.

1490457517 is a deficient number, since it is larger than the sum of its proper divisors (365103).

1490457517 is an equidigital number, since it uses as much as digits as its factorization.

1490457517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365102.

The product of its (nonzero) digits is 176400, while the sum is 43.

The square root of 1490457517 is about 38606.4439828379. The cubic root of 1490457517 is about 1142.2816509791.

The spelling of 1490457517 in words is "one billion, four hundred ninety million, four hundred fifty-seven thousand, five hundred seventeen".