9541821 has 8 divisors (see below), whose sum is σ = 12738880. Its totient is φ = 6352992.

The previous prime is 9541813. The next prime is 9541823. The reversal of 9541821 is 1281459.

It is a happy number.

9541821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 9541821 - 2³ = 9541813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9541823) 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, 1560 + ... + 4638.

It is an arithmetic number, because the mean of its divisors is an integer number (1592360).

Almost surely, 2^9541821 is an apocalyptic number.

It is an amenable number.

9541821 is a deficient number, since it is larger than the sum of its proper divisors (3197059).

9541821 is a wasteful number, since it uses less digits than its factorization.

9541821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4115.

The product of its digits is 2880, while the sum is 30.

The square root of 9541821 is about 3088.9838134895. The cubic root of 9541821 is about 212.1015074001.

It can be divided in two parts, 954 and 1821, that added together give a triangular number (2775 = T₇₄).

The spelling of 9541821 in words is "nine million, five hundred forty-one thousand, eight hundred twenty-one".