4002534121 has 4 divisors (see below), whose sum is σ = 4017413700. Its totient is φ = 3987654544.

The previous prime is 4002534119. The next prime is 4002534203. The reversal of 4002534121 is 1214352004.

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 98783721 + 3903750400 = 9939^2 + 62480^2 .

It is a cyclic number.

It is not a de Polignac number, because 4002534121 - 2¹ = 4002534119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4002534092 and 4002534101.

It is not an unprimeable number, because it can be changed into a prime (4002534421) 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, 7439386 + ... + 7439923.

It is an arithmetic number, because the mean of its divisors is an integer number (1004353425).

Almost surely, 2^4002534121 is an apocalyptic number.

It is an amenable number.

4002534121 is a deficient number, since it is larger than the sum of its proper divisors (14879579).

4002534121 is a wasteful number, since it uses less digits than its factorization.

4002534121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14879578.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 4002534121 is about 63265.5840169045. The cubic root of 4002534121 is about 1587.7362033971.

Adding to 4002534121 its reverse (1214352004), we get a palindrome (5216886125).

The spelling of 4002534121 in words is "four billion, two million, five hundred thirty-four thousand, one hundred twenty-one".