2142606187 has 4 divisors (see below), whose sum is σ = 2158020760. Its totient is φ = 2127191616.

The previous prime is 2142606127. The next prime is 2142606197. The reversal of 2142606187 is 7816062412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2142606187 is a prime.

It is a super-2 number, since 2×2142606187² = 9181522545141357938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2142606127) 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, 7707078 + ... + 7707355.

It is an arithmetic number, because the mean of its divisors is an integer number (539505190).

Almost surely, 2^2142606187 is an apocalyptic number.

2142606187 is a deficient number, since it is larger than the sum of its proper divisors (15414573).

2142606187 is a wasteful number, since it uses less digits than its factorization.

2142606187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15414572.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 2142606187 is about 46288.2942761990. The cubic root of 2142606187 is about 1289.1816589304.

Adding to 2142606187 its reverse (7816062412), we get a palindrome (9958668599).

The spelling of 2142606187 in words is "two billion, one hundred forty-two million, six hundred six thousand, one hundred eighty-seven".