5145661 has 2 divisors, whose sum is σ = 5145662. Its totient is φ = 5145660.

The previous prime is 5145643. The next prime is 5145671. The reversal of 5145661 is 1665415.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4280761 + 864900 = 2069^2 + 930^2 .

It is a cyclic number.

It is not a de Polignac number, because 5145661 - 2⁹ = 5145149 is a prime.

5145661 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5145601) 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, 2572830 + 2572831.

It is an arithmetic number, because the mean of its divisors is an integer number (2572831).

Almost surely, 2^5145661 is an apocalyptic number.

It is an amenable number.

5145661 is a deficient number, since it is larger than the sum of its proper divisors (1).

5145661 is an equidigital number, since it uses as much as digits as its factorization.

5145661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3600, while the sum is 28.

The square root of 5145661 is about 2268.4049462122. The cubic root of 5145661 is about 172.6422379305.

The spelling of 5145661 in words is "five million, one hundred forty-five thousand, six hundred sixty-one".