1722531 has 8 divisors (see below), whose sum is σ = 2329344. Its totient is φ = 1132040.

The previous prime is 1722529. The next prime is 1722551. The reversal of 1722531 is 1352271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1722531 - 2¹ = 1722529 is a prime.

It is a super-2 number, since 2×1722531² = 5934226091922, which contains 22 as substring.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1722498 and 1722507.

It is not an unprimeable number, because it can be changed into a prime (1722551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3831 + ... + 4256.

It is an arithmetic number, because the mean of its divisors is an integer number (291168).

2^1722531 is an apocalyptic number.

1722531 is a deficient number, since it is larger than the sum of its proper divisors (606813).

1722531 is an equidigital number, since it uses as much as digits as its factorization.

1722531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8161.

The product of its digits is 420, while the sum is 21.

The square root of 1722531 is about 1312.4522848470. The cubic root of 1722531 is about 119.8732689853.

The spelling of 1722531 in words is "one million, seven hundred twenty-two thousand, five hundred thirty-one".