1721952 has 48 divisors (see below), whose sum is σ = 5024880. Its totient is φ = 573696.

The previous prime is 1721927. The next prime is 1721983. The reversal of 1721952 is 2591271.

It is a tau number, because it is divible by the number of its divisors (48).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133 + ... + 1860.

It is an arithmetic number, because the mean of its divisors is an integer number (104685).

2^1721952 is an apocalyptic number.

1721952 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1721952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2512440).

1721952 is an abundant number, since it is smaller than the sum of its proper divisors (3302928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1721952 is a wasteful number, since it uses less digits than its factorization.

1721952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2012 (or 1998 counting only the distinct ones).

The product of its digits is 1260, while the sum is 27.

The square root of 1721952 is about 1312.2316868602. The cubic root of 1721952 is about 119.8598363483.

It can be divided in two parts, 17219 and 52, that added together give a palindrome (17271).

The spelling of 1721952 in words is "one million, seven hundred twenty-one thousand, nine hundred fifty-two".