2142775 has 6 divisors (see below), whose sum is σ = 2657072. Its totient is φ = 1714200.

The previous prime is 2142773. The next prime is 2142793. The reversal of 2142775 is 5772412.

It is not a de Polignac number, because 2142775 - 2¹ = 2142773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2142773) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 42831 + ... + 42880.

2^2142775 is an apocalyptic number.

2142775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2142775 is a deficient number, since it is larger than the sum of its proper divisors (514297).

2142775 is an equidigital number, since it uses as much as digits as its factorization.

2142775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85721 (or 85716 counting only the distinct ones).

The product of its digits is 3920, while the sum is 28.

The square root of 2142775 is about 1463.8220520268. The cubic root of 2142775 is about 128.9215515659.

The spelling of 2142775 in words is "two million, one hundred forty-two thousand, seven hundred seventy-five".