1952821 has 4 divisors (see below), whose sum is σ = 2103052. Its totient is φ = 1802592.

The previous prime is 1952813. The next prime is 1952833. The reversal of 1952821 is 1282591.

It is the 571-st star number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1282591 = 607 ⋅2113.

It can be written as a sum of positive squares in 2 ways, for example, as 130321 + 1822500 = 361^2 + 1350^2 .

It is a cyclic number.

It is not a de Polignac number, because 1952821 - 2³ = 1952813 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1952821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1952851) 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, 75096 + ... + 75121.

It is an arithmetic number, because the mean of its divisors is an integer number (525763).

2^1952821 is an apocalyptic number.

It is an amenable number.

1952821 is a deficient number, since it is larger than the sum of its proper divisors (150231).

1952821 is a wasteful number, since it uses less digits than its factorization.

1952821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150230.

The product of its digits is 1440, while the sum is 28.

The square root of 1952821 is about 1397.4337193585. The cubic root of 1952821 is about 124.9935143302.

The spelling of 1952821 in words is "one million, nine hundred fifty-two thousand, eight hundred twenty-one".