2142788 has 6 divisors (see below), whose sum is σ = 3749886. Its totient is φ = 1071392.

The previous prime is 2142773. The next prime is 2142793. The reversal of 2142788 is 8872412.

It can be written as a sum of positive squares in only one way, i.e., 1098304 + 1044484 = 1048^2 + 1022^2 .

It is an Ulam number.

It is a plaindrome in base 11.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 267845 + ... + 267852.

It is an arithmetic number, because the mean of its divisors is an integer number (624981).

2^2142788 is an apocalyptic number.

It is an amenable number.

2142788 is a deficient number, since it is larger than the sum of its proper divisors (1607098).

2142788 is a wasteful number, since it uses less digits than its factorization.

2142788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535701 (or 535699 counting only the distinct ones).

The product of its digits is 7168, while the sum is 32.

The square root of 2142788 is about 1463.8264924505. The cubic root of 2142788 is about 128.9218122834.

The spelling of 2142788 in words is "two million, one hundred forty-two thousand, seven hundred eighty-eight".