1512661 has 2 divisors, whose sum is σ = 1512662. Its totient is φ = 1512660.

The previous prime is 1512629. The next prime is 1512683. The reversal of 1512661 is 1662151.

It is an a-pointer prime, because the next prime (1512683) can be obtained adding 1512661 to its sum of digits (22).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1425636 + 87025 = 1194^2 + 295^2 .

It is a cyclic number.

It is not a de Polignac number, because 1512661 - 2⁵ = 1512629 is a prime.

It is a Chen prime.

It is equal to p₁₁₅₀₇₈ and since 1512661 and 115078 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1512691) 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, 756330 + 756331.

It is an arithmetic number, because the mean of its divisors is an integer number (756331).

2^1512661 is an apocalyptic number.

It is an amenable number.

1512661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1512661 is an equidigital number, since it uses as much as digits as its factorization.

1512661 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 1512661 is about 1229.9028416912. The cubic root of 1512661 is about 114.7925940258.

The spelling of 1512661 in words is "one million, five hundred twelve thousand, six hundred sixty-one".