7272421 has 8 divisors (see below), whose sum is σ = 8244320. Its totient is φ = 6359472.

The previous prime is 7272409. The next prime is 7272427. The reversal of 7272421 is 1242727.

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

It is a cyclic number.

It is not a de Polignac number, because 7272421 - 2¹⁵ = 7239653 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 (7272427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14475 + ... + 14968.

It is an arithmetic number, because the mean of its divisors is an integer number (1030540).

Almost surely, 2^7272421 is an apocalyptic number.

It is an amenable number.

7272421 is a deficient number, since it is larger than the sum of its proper divisors (971899).

7272421 is a wasteful number, since it uses less digits than its factorization.

7272421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29475.

The product of its digits is 1568, while the sum is 25.

The square root of 7272421 is about 2696.7426647717. The cubic root of 7272421 is about 193.7431414846.

The spelling of 7272421 in words is "seven million, two hundred seventy-two thousand, four hundred twenty-one".