1516531 has 2 divisors, whose sum is σ = 1516532. Its totient is φ = 1516530.

The previous prime is 1516513. The next prime is 1516547. The reversal of 1516531 is 1356151.

Together with previous prime (1516513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (1356151) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1516531 - 2⁵ = 1516499 is a prime.

It is a super-2 number, since 2×1516531² = 4599732547922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1516591) 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 as a sum of consecutive naturals, namely, 758265 + 758266.

It is an arithmetic number, because the mean of its divisors is an integer number (758266).

2^1516531 is an apocalyptic number.

1516531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1516531 is an equidigital number, since it uses as much as digits as its factorization.

1516531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 450, while the sum is 22.

The square root of 1516531 is about 1231.4751317018. The cubic root of 1516531 is about 114.8904059880.

The spelling of 1516531 in words is "one million, five hundred sixteen thousand, five hundred thirty-one".