2615761 has 2 divisors, whose sum is σ = 2615762. Its totient is φ = 2615760.

The previous prime is 2615737. The next prime is 2615779. The reversal of 2615761 is 1675162.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1500625 + 1115136 = 1225^2 + 1056^2 .

It is a cyclic number.

It is not a de Polignac number, because 2615761 - 2¹¹ = 2613713 is a prime.

2615761 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2615731) 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, 1307880 + 1307881.

It is an arithmetic number, because the mean of its divisors is an integer number (1307881).

2^2615761 is an apocalyptic number.

2615761 is the 865-th centered heptagonal number.

It is an amenable number.

2615761 is a deficient number, since it is larger than the sum of its proper divisors (1).

2615761 is an equidigital number, since it uses as much as digits as its factorization.

2615761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2520, while the sum is 28.

The square root of 2615761 is about 1617.3314440769. The cubic root of 2615761 is about 137.7841792079.

The spelling of 2615761 in words is "two million, six hundred fifteen thousand, seven hundred sixty-one".