1516261 has 2 divisors, whose sum is σ = 1516262. Its totient is φ = 1516260.

The previous prime is 1516259. The next prime is 1516279. The reversal of 1516261 is 1626151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1515361 + 900 = 1231^2 + 30^2 .

It is a cyclic number.

It is not a de Polignac number, because 1516261 - 2¹ = 1516259 is a prime.

Together with 1516259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1516231) 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 as a sum of consecutive naturals, namely, 758130 + 758131.

It is an arithmetic number, because the mean of its divisors is an integer number (758131).

2^1516261 is an apocalyptic number.

It is an amenable number.

1516261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1516261 is an equidigital number, since it uses as much as digits as its factorization.

1516261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 360, while the sum is 22.

The square root of 1516261 is about 1231.3655021966. The cubic root of 1516261 is about 114.8835873010.

The spelling of 1516261 in words is "one million, five hundred sixteen thousand, two hundred sixty-one".