2145547 has 2 divisors, whose sum is σ = 2145548. Its totient is φ = 2145546.

The previous prime is 2145529. The next prime is 2145551. The reversal of 2145547 is 7455412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2145547 - 2¹⁵ = 2112779 is a prime.

It is not a weakly prime, because it can be changed into another prime (2145047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072773 + 1072774.

It is an arithmetic number, because the mean of its divisors is an integer number (1072774).

2^2145547 is an apocalyptic number.

2145547 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145547 is an equidigital number, since it uses as much as digits as its factorization.

2145547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5600, while the sum is 28.

The square root of 2145547 is about 1464.7685824047. The cubic root of 2145547 is about 128.9771207145.

The spelling of 2145547 in words is "two million, one hundred forty-five thousand, five hundred forty-seven".