4025454121 has 4 divisors (see below), whose sum is σ = 4335104452. Its totient is φ = 3715803792.

The previous prime is 4025454113. The next prime is 4025454197. The reversal of 4025454121 is 1214545204.

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 1102970521 + 2922483600 = 33211^2 + 54060^2 .

It is a cyclic number.

It is not a de Polignac number, because 4025454121 - 2³ = 4025454113 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4025454121.

It is not an unprimeable number, because it can be changed into a prime (4025454421) 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, 154825146 + ... + 154825171.

It is an arithmetic number, because the mean of its divisors is an integer number (1083776113).

Almost surely, 2^4025454121 is an apocalyptic number.

It is an amenable number.

4025454121 is a deficient number, since it is larger than the sum of its proper divisors (309650331).

4025454121 is a wasteful number, since it uses less digits than its factorization.

4025454121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309650330.

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 4025454121 is about 63446.4665761617. The cubic root of 4025454121 is about 1590.7610929785.

Adding to 4025454121 its reverse (1214545204), we get a palindrome (5239999325).

The spelling of 4025454121 in words is "four billion, twenty-five million, four hundred fifty-four thousand, one hundred twenty-one".