2142207 has 20 divisors (see below), whose sum is σ = 3267000. Its totient is φ = 1398384.

The previous prime is 2142181. The next prime is 2142211. The reversal of 2142207 is 7022412.

It is a de Polignac number, because none of the positive numbers 2^k-2142207 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2142207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2142227) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4044 + ... + 4542.

It is an arithmetic number, because the mean of its divisors is an integer number (163350).

2^2142207 is an apocalyptic number.

2142207 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

2142207 is a deficient number, since it is larger than the sum of its proper divisors (1124793).

2142207 is an equidigital number, since it uses as much as digits as its factorization.

2142207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564 (or 555 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 2142207 is about 1463.6280265149. The cubic root of 2142207 is about 128.9101591872.

Adding to 2142207 its reverse (7022412), we get a palindrome (9164619).

The spelling of 2142207 in words is "two million, one hundred forty-two thousand, two hundred seven".