4515421 has 4 divisors (see below), whose sum is σ = 4781052. Its totient is φ = 4249792.

The previous prime is 4515419. The next prime is 4515457. The reversal of 4515421 is 1245154.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1245154 = 2 ⋅622577.

It can be written as a sum of positive squares in 2 ways, for example, as 2722500 + 1792921 = 1650^2 + 1339^2 .

It is a cyclic number.

It is not a de Polignac number, because 4515421 - 2¹ = 4515419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4515392 and 4515401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4515461) 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, 132790 + ... + 132823.

It is an arithmetic number, because the mean of its divisors is an integer number (1195263).

Almost surely, 2^4515421 is an apocalyptic number.

It is an amenable number.

4515421 is a deficient number, since it is larger than the sum of its proper divisors (265631).

4515421 is a wasteful number, since it uses less digits than its factorization.

4515421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265630.

The product of its digits is 800, while the sum is 22.

The square root of 4515421 is about 2124.9519994579. The cubic root of 4515421 is about 165.2847363928.

The spelling of 4515421 in words is "four million, five hundred fifteen thousand, four hundred twenty-one".