4245052121 has 4 divisors (see below), whose sum is σ = 4256136192. Its totient is φ = 4233968052.

The previous prime is 4245052117. The next prime is 4245052153. The reversal of 4245052121 is 1212505424.

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 4245052121 - 2² = 4245052117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4245052111) 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, 5541461 + ... + 5542226.

It is an arithmetic number, because the mean of its divisors is an integer number (1064034048).

Almost surely, 2^4245052121 is an apocalyptic number.

It is an amenable number.

4245052121 is a deficient number, since it is larger than the sum of its proper divisors (11084071).

4245052121 is a wasteful number, since it uses less digits than its factorization.

4245052121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11084070.

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 4245052121 is about 65154.0645009964. The cubic root of 4245052121 is about 1619.1770601813.

Adding to 4245052121 its reverse (1212505424), we get a palindrome (5457557545).

The spelling of 4245052121 in words is "four billion, two hundred forty-five million, fifty-two thousand, one hundred twenty-one".