4651542421 has 4 divisors (see below), whose sum is σ = 4663816000. Its totient is φ = 4639268844.

The previous prime is 4651542353. The next prime is 4651542433. The reversal of 4651542421 is 1242451564.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4651542421 - 2⁷ = 4651542293 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 (4651542451) 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, 6136221 + ... + 6136978.

It is an arithmetic number, because the mean of its divisors is an integer number (1165954000).

Almost surely, 2^4651542421 is an apocalyptic number.

It is an amenable number.

4651542421 is a deficient number, since it is larger than the sum of its proper divisors (12273579).

4651542421 is a wasteful number, since it uses less digits than its factorization.

4651542421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12273578.

The product of its digits is 38400, while the sum is 34.

The square root of 4651542421 is about 68202.2171267181. The cubic root of 4651542421 is about 1669.2920638334.

Adding to 4651542421 its reverse (1242451564), we get a palindrome (5893993985).

The spelling of 4651542421 in words is "four billion, six hundred fifty-one million, five hundred forty-two thousand, four hundred twenty-one".