7236421 has 4 divisors (see below), whose sum is σ = 7551072. Its totient is φ = 6921772.

The previous prime is 7236419. The next prime is 7236431. The reversal of 7236421 is 1246327.

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 a cyclic number.

It is not a de Polignac number, because 7236421 - 2¹ = 7236419 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 (7236431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157291 + ... + 157336.

It is an arithmetic number, because the mean of its divisors is an integer number (1887768).

Almost surely, 2^7236421 is an apocalyptic number.

It is an amenable number.

7236421 is a deficient number, since it is larger than the sum of its proper divisors (314651).

7236421 is a wasteful number, since it uses less digits than its factorization.

7236421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314650.

The product of its digits is 2016, while the sum is 25.

The square root of 7236421 is about 2690.0596647658. The cubic root of 7236421 is about 193.4229228726.

The spelling of 7236421 in words is "seven million, two hundred thirty-six thousand, four hundred twenty-one".