2145777 has 4 divisors (see below), whose sum is σ = 2861040. Its totient is φ = 1430516.

The previous prime is 2145769. The next prime is 2145779. The reversal of 2145777 is 7775412.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2145777 - 2³ = 2145769 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (2145779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 357627 + ... + 357632.

It is an arithmetic number, because the mean of its divisors is an integer number (715260).

2^2145777 is an apocalyptic number.

It is an amenable number.

2145777 is a deficient number, since it is larger than the sum of its proper divisors (715263).

2145777 is an equidigital number, since it uses as much as digits as its factorization.

2145777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715262.

The product of its digits is 13720, while the sum is 33.

The square root of 2145777 is about 1464.8470909962. The cubic root of 2145777 is about 128.9817292795.

The spelling of 2145777 in words is "two million, one hundred forty-five thousand, seven hundred seventy-seven".