7436421 has 8 divisors (see below), whose sum is σ = 11016960. Its totient is φ = 4957596.

The previous prime is 7436411. The next prime is 7436423. The reversal of 7436421 is 1246347.

It is not a de Polignac number, because 7436421 - 2⁵ = 7436389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 275423 = 7436421 / (7 + 4 + 3 + 6 + 4 + 2 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7436423) 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 7 ways as a sum of consecutive naturals, for example, 137685 + ... + 137738.

It is an arithmetic number, because the mean of its divisors is an integer number (1377120).

Almost surely, 2^7436421 is an apocalyptic number.

It is an amenable number.

7436421 is a deficient number, since it is larger than the sum of its proper divisors (3580539).

7436421 is a wasteful number, since it uses less digits than its factorization.

7436421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275432 (or 275426 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 7436421 is about 2726.9801979479. The cubic root of 7436421 is about 195.1886930906.

The spelling of 7436421 in words is "seven million, four hundred thirty-six thousand, four hundred twenty-one".