2715649 has 2 divisors, whose sum is σ = 2715650. Its totient is φ = 2715648.

The previous prime is 2715637. The next prime is 2715653. The reversal of 2715649 is 9465172.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1575025 + 1140624 = 1255^2 + 1068^2 .

It is a cyclic number.

It is not a de Polignac number, because 2715649 - 2⁵ = 2715617 is a prime.

It is not a weakly prime, because it can be changed into another prime (2715619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1357824 + 1357825.

It is an arithmetic number, because the mean of its divisors is an integer number (1357825).

It is a Proth number, since it is equal to 663 ⋅ 2¹² + 1 and 663 < 2¹².

2^2715649 is an apocalyptic number.

It is an amenable number.

2715649 is a deficient number, since it is larger than the sum of its proper divisors (1).

2715649 is an equidigital number, since it uses as much as digits as its factorization.

2715649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 34.

The square root of 2715649 is about 1647.9226316790. The cubic root of 2715649 is about 139.5161699802.

Subtracting from 2715649 its sum of digits (34), we obtain a triangular number (2715615 = T₂₃₃₀).

It can be divided in two parts, 2715 and 649, that added together give a square (3364 = 58²).

The spelling of 2715649 in words is "two million, seven hundred fifteen thousand, six hundred forty-nine".