4651421 has 4 divisors (see below), whose sum is σ = 4925052. Its totient is φ = 4377792.

The previous prime is 4651399. The next prime is 4651429. The reversal of 4651421 is 1241564.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3463321 + 1188100 = 1861^2 + 1090^2 .

It is a cyclic number.

It is not a de Polignac number, because 4651421 - 2²² = 457117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4651429) 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, 136790 + ... + 136823.

It is an arithmetic number, because the mean of its divisors is an integer number (1231263).

Almost surely, 2^4651421 is an apocalyptic number.

It is an amenable number.

4651421 is a deficient number, since it is larger than the sum of its proper divisors (273631).

4651421 is a wasteful number, since it uses less digits than its factorization.

4651421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273630.

The product of its digits is 960, while the sum is 23.

The square root of 4651421 is about 2156.7153266020. The cubic root of 4651421 is about 166.9277538983.

Adding to 4651421 its reverse (1241564), we get a palindrome (5892985).

The spelling of 4651421 in words is "four million, six hundred fifty-one thousand, four hundred twenty-one".