2142397 has 2 divisors, whose sum is σ = 2142398. Its totient is φ = 2142396.

The previous prime is 2142377. The next prime is 2142403. The reversal of 2142397 is 7932412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1653796 + 488601 = 1286^2 + 699^2 .

It is a cyclic number.

It is not a de Polignac number, because 2142397 - 2¹¹ = 2140349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2142377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071198 + 1071199.

It is an arithmetic number, because the mean of its divisors is an integer number (1071199).

2^2142397 is an apocalyptic number.

It is an amenable number.

2142397 is a deficient number, since it is larger than the sum of its proper divisors (1).

2142397 is an equidigital number, since it uses as much as digits as its factorization.

2142397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 28.

The square root of 2142397 is about 1463.6929322778. The cubic root of 2142397 is about 128.9139702422.

The spelling of 2142397 in words is "two million, one hundred forty-two thousand, three hundred ninety-seven".