1731361 has 2 divisors, whose sum is σ = 1731362. Its totient is φ = 1731360.

The previous prime is 1731349. The next prime is 1731377. The reversal of 1731361 is 1631371.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1115136 + 616225 = 1056^2 + 785^2 .

It is a cyclic number.

It is not a de Polignac number, because 1731361 - 2⁹ = 1730849 is a prime.

It is a super-2 number, since 2×1731361² = 5995221824642, which contains 22 as substring.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1731311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 865680 + 865681.

It is an arithmetic number, because the mean of its divisors is an integer number (865681).

2^1731361 is an apocalyptic number.

It is an amenable number.

1731361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1731361 is an equidigital number, since it uses as much as digits as its factorization.

1731361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 378, while the sum is 22.

The square root of 1731361 is about 1315.8119166507. The cubic root of 1731361 is about 120.0777505388.

The spelling of 1731361 in words is "one million, seven hundred thirty-one thousand, three hundred sixty-one".