1722541 has 4 divisors (see below), whose sum is σ = 1725184. Its totient is φ = 1719900.

The previous prime is 1722529. The next prime is 1722551. The reversal of 1722541 is 1452271.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1722541 - 2⁹ = 1722029 is a prime.

It is a super-3 number, since 3×1722541³ = 15333099648241159263, which contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 436 + ... + 1906.

It is an arithmetic number, because the mean of its divisors is an integer number (431296).

2^1722541 is an apocalyptic number.

It is an amenable number.

1722541 is a deficient number, since it is larger than the sum of its proper divisors (2643).

1722541 is a wasteful number, since it uses less digits than its factorization.

1722541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2642.

The product of its digits is 560, while the sum is 22.

The square root of 1722541 is about 1312.4560945037. The cubic root of 1722541 is about 119.8735009560.

The spelling of 1722541 in words is "one million, seven hundred twenty-two thousand, five hundred forty-one".