2398221 has 16 divisors (see below), whose sum is σ = 4060800. Its totient is φ = 1370304.

The previous prime is 2398211. The next prime is 2398223. The reversal of 2398221 is 1228932.

It is a happy number.

It is not a de Polignac number, because 2398221 - 2⁵ = 2398189 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2398223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6156 + ... + 6533.

It is an arithmetic number, because the mean of its divisors is an integer number (253800).

2^2398221 is an apocalyptic number.

2398221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2398221 is a deficient number, since it is larger than the sum of its proper divisors (1662579).

2398221 is a wasteful number, since it uses less digits than its factorization.

2398221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12705 (or 12699 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 2398221 is about 1548.6190622616. The cubic root of 2398221 is about 133.8535006943.

The spelling of 2398221 in words is "two million, three hundred ninety-eight thousand, two hundred twenty-one".