2145529 has 2 divisors, whose sum is σ = 2145530. Its totient is φ = 2145528.

The previous prime is 2145497. The next prime is 2145547. The reversal of 2145529 is 9255412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1505529 + 640000 = 1227^2 + 800^2 .

It is a cyclic number.

It is not a de Polignac number, because 2145529 - 2⁵ = 2145497 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2145497 and 2145506.

It is not a weakly prime, because it can be changed into another prime (2145329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072764 + 1072765.

It is an arithmetic number, because the mean of its divisors is an integer number (1072765).

2^2145529 is an apocalyptic number.

It is an amenable number.

2145529 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145529 is an equidigital number, since it uses as much as digits as its factorization.

2145529 is an evil number, because the sum of its binary digits is even.

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

The square root of 2145529 is about 1464.7624380766. The cubic root of 2145529 is about 128.9767600304.

The spelling of 2145529 in words is "two million, one hundred forty-five thousand, five hundred twenty-nine".