2142989 has 4 divisors (see below), whose sum is σ = 2146080. Its totient is φ = 2139900.

The previous prime is 2142971. The next prime is 2143019. The reversal of 2142989 is 9892412.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2142989 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2147989) 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, 32 + ... + 2070.

It is an arithmetic number, because the mean of its divisors is an integer number (536520).

2^2142989 is an apocalyptic number.

It is an amenable number.

2142989 is a deficient number, since it is larger than the sum of its proper divisors (3091).

2142989 is a wasteful number, since it uses less digits than its factorization.

2142989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3090.

The product of its digits is 10368, while the sum is 35.

The square root of 2142989 is about 1463.8951465184. The cubic root of 2142989 is about 128.9258432428.

The spelling of 2142989 in words is "two million, one hundred forty-two thousand, nine hundred eighty-nine".