1722137 has 2 divisors, whose sum is σ = 1722138. Its totient is φ = 1722136.

The previous prime is 1722131. The next prime is 1722163. The reversal of 1722137 is 7312271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 913936 + 808201 = 956^2 + 899^2 .

It is an emirp because it is prime and its reverse (7312271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1722137 - 2⁶ = 1722073 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1722131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 861068 + 861069.

It is an arithmetic number, because the mean of its divisors is an integer number (861069).

2^1722137 is an apocalyptic number.

It is an amenable number.

1722137 is a deficient number, since it is larger than the sum of its proper divisors (1).

1722137 is an equidigital number, since it uses as much as digits as its factorization.

1722137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 588, while the sum is 23.

The square root of 1722137 is about 1312.3021755678. The cubic root of 1722137 is about 119.8641286235.

The spelling of 1722137 in words is "one million, seven hundred twenty-two thousand, one hundred thirty-seven".