2145617 has 2 divisors, whose sum is σ = 2145618. Its totient is φ = 2145616.

The previous prime is 2145551. The next prime is 2145629. The reversal of 2145617 is 7165412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2062096 + 83521 = 1436^2 + 289^2 .

It is a cyclic number.

It is not a de Polignac number, because 2145617 - 2⁸ = 2145361 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2145677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072808 + 1072809.

It is an arithmetic number, because the mean of its divisors is an integer number (1072809).

2^2145617 is an apocalyptic number.

It is an amenable number.

2145617 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145617 is an equidigital number, since it uses as much as digits as its factorization.

2145617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1680, while the sum is 26.

The square root of 2145617 is about 1464.7924767693. The cubic root of 2145617 is about 128.9785233561.

The spelling of 2145617 in words is "two million, one hundred forty-five thousand, six hundred seventeen".