8450421 has 16 divisors (see below), whose sum is σ = 13555200. Its totient is φ = 4574448.

The previous prime is 8450419. The next prime is 8450423. The reversal of 8450421 is 1240548.

It is an interprime number because it is at equal distance from previous prime (8450419) and next prime (8450423).

It is not a de Polignac number, because 8450421 - 2¹ = 8450419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8450391 and 8450400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8450423) 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, 10191 + ... + 10988.

It is an arithmetic number, because the mean of its divisors is an integer number (847200).

Almost surely, 2^8450421 is an apocalyptic number.

It is an amenable number.

8450421 is a deficient number, since it is larger than the sum of its proper divisors (5104779).

8450421 is a wasteful number, since it uses less digits than its factorization.

8450421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21208.

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 8450421 is about 2906.9607840492. The cubic root of 8450421 is about 203.6851882132.

Adding to 8450421 its reverse (1240548), we get a palindrome (9690969).

It can be divided in two parts, 84 and 50421, that multiplied together give a square (4235364 = 2058²).

The spelling of 8450421 in words is "eight million, four hundred fifty thousand, four hundred twenty-one".