736421 has 16 divisors (see below), whose sum is σ = 912000. Its totient is φ = 592704.

The previous prime is 736409. The next prime is 736429. The reversal of 736421 is 124637.

It is not a de Polignac number, because 736421 - 2⁶ = 736357 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 736421.

It is not an unprimeable number, because it can be changed into a prime (736429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6461 + ... + 6573.

It is an arithmetic number, because the mean of its divisors is an integer number (57000).

2⁷³⁶⁴²¹ is an apocalyptic number.

It is an amenable number.

736421 is a deficient number, since it is larger than the sum of its proper divisors (175579).

736421 is a wasteful number, since it uses less digits than its factorization.

736421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153 (or 139 counting only the distinct ones).

The product of its digits is 1008, while the sum is 23.

The square root of 736421 is about 858.1497538309. The cubic root of 736421 is about 90.3043605049.

The spelling of 736421 in words is "seven hundred thirty-six thousand, four hundred twenty-one".