2401221 has 4 divisors (see below), whose sum is σ = 3201632. Its totient is φ = 1600812.

The previous prime is 2401219. The next prime is 2401237. The reversal of 2401221 is 1221042.

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.

It is not a de Polignac number, because 2401221 - 2¹ = 2401219 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2401197 and 2401206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2401211) 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, 400201 + ... + 400206.

It is an arithmetic number, because the mean of its divisors is an integer number (800408).

2^2401221 is an apocalyptic number.

It is an amenable number.

2401221 is a deficient number, since it is larger than the sum of its proper divisors (800411).

2401221 is an equidigital number, since it uses as much as digits as its factorization.

2401221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800410.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 2401221 is about 1549.5873644296. The cubic root of 2401221 is about 133.9092911014.

Adding to 2401221 its reverse (1221042), we get a palindrome (3622263).

The spelling of 2401221 in words is "two million, four hundred one thousand, two hundred twenty-one".