4551242121 has 32 divisors (see below), whose sum is σ = 7104204800. Its totient is φ = 2871735120.

The previous prime is 4551242119. The next prime is 4551242161. The reversal of 4551242121 is 1212421554.

It is a happy number.

It is not a de Polignac number, because 4551242121 - 2¹ = 4551242119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4551242161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 627900 + ... + 635106.

It is an arithmetic number, because the mean of its divisors is an integer number (222006400).

Almost surely, 2^4551242121 is an apocalyptic number.

It is an amenable number.

4551242121 is a deficient number, since it is larger than the sum of its proper divisors (2552962679).

4551242121 is a wasteful number, since it uses less digits than its factorization.

4551242121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8466 (or 8460 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 4551242121 is about 67462.8944012929. The cubic root of 4551242121 is about 1657.2065711811.

Adding to 4551242121 its reverse (1212421554), we get a palindrome (5763663675).

The spelling of 4551242121 in words is "four billion, five hundred fifty-one million, two hundred forty-two thousand, one hundred twenty-one".