7220401 has 4 divisors (see below), whose sum is σ = 7225972. Its totient is φ = 7214832.

The previous prime is 7220383. The next prime is 7220407. The reversal of 7220401 is 1040227.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 5645376 + 1575025 = 2376^2 + 1255^2 .

It is a cyclic number.

It is not a de Polignac number, because 7220401 - 2¹³ = 7212209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7220407) 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, 295 + ... + 3811.

It is an arithmetic number, because the mean of its divisors is an integer number (1806493).

Almost surely, 2^7220401 is an apocalyptic number.

It is an amenable number.

7220401 is a deficient number, since it is larger than the sum of its proper divisors (5571).

7220401 is a wasteful number, since it uses less digits than its factorization.

7220401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5570.

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 7220401 is about 2687.0803858463. The cubic root of 7220401 is about 193.2800840932.

Adding to 7220401 its reverse (1040227), we get a palindrome (8260628).

The spelling of 7220401 in words is "seven million, two hundred twenty thousand, four hundred one".