1723522 has 4 divisors (see below), whose sum is σ = 2585286. Its totient is φ = 861760.

The previous prime is 1723489. The next prime is 1723523. The reversal of 1723522 is 2253271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2253271 = 29 ⋅77699.

It can be written as a sum of positive squares in only one way, i.e., 1661521 + 62001 = 1289^2 + 249^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1723493 and 1723502.

It is not an unprimeable number, because it can be changed into a prime (1723523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430879 + ... + 430882.

2^1723522 is an apocalyptic number.

1723522 is a deficient number, since it is larger than the sum of its proper divisors (861764).

1723522 is an equidigital number, since it uses as much as digits as its factorization.

1723522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861763.

The product of its digits is 840, while the sum is 22.

The square root of 1723522 is about 1312.8297680964. The cubic root of 1723522 is about 119.8962529230.

Adding to 1723522 its reverse (2253271), we get a palindrome (3976793).

The spelling of 1723522 in words is "one million, seven hundred twenty-three thousand, five hundred twenty-two".