2145571 has 8 divisors (see below), whose sum is σ = 2250864. Its totient is φ = 2042880.

The previous prime is 2145551. The next prime is 2145617. The reversal of 2145571 is 1755412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2145571 - 2⁷ = 2145443 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (2145551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1155 + ... + 2371.

It is an arithmetic number, because the mean of its divisors is an integer number (281358).

2^2145571 is an apocalyptic number.

2145571 is a deficient number, since it is larger than the sum of its proper divisors (105293).

2145571 is a wasteful number, since it uses less digits than its factorization.

2145571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1301.

The product of its digits is 1400, while the sum is 25.

The square root of 2145571 is about 1464.7767748022. The cubic root of 2145571 is about 128.9776016237.

The spelling of 2145571 in words is "two million, one hundred forty-five thousand, five hundred seventy-one".