732421 has 4 divisors (see below), whose sum is σ = 738144. Its totient is φ = 726700.

The previous prime is 732373. The next prime is 732439. The reversal of 732421 is 124237.

732421 is nontrivially palindromic in base 5.

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, and also an emirpimes, since its reverse is a distinct semiprime: 124237 = 283 ⋅439.

It is a cyclic number.

It is not a de Polignac number, because 732421 - 2⁷ = 732293 is a prime.

It is a Duffinian number.

732421 is an undulating number in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (732461) 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, 2665 + ... + 2926.

It is an arithmetic number, because the mean of its divisors is an integer number (184536).

2⁷³²⁴²¹ is an apocalyptic number.

It is an amenable number.

732421 is a deficient number, since it is larger than the sum of its proper divisors (5723).

732421 is a wasteful number, since it uses less digits than its factorization.

732421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5722.

The product of its digits is 336, while the sum is 19.

The square root of 732421 is about 855.8159848939. The cubic root of 732421 is about 90.1405622482.

Adding to 732421 its reverse (124237), we get a palindrome (856658).

The spelling of 732421 in words is "seven hundred thirty-two thousand, four hundred twenty-one".