4020252541 has 4 divisors (see below), whose sum is σ = 4231844800. Its totient is φ = 3808660284.

The previous prime is 4020252521. The next prime is 4020252557. The reversal of 4020252541 is 1452520204.

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 4020252541 - 2⁹ = 4020252029 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 (4020252521) 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, 105796101 + ... + 105796138.

It is an arithmetic number, because the mean of its divisors is an integer number (1057961200).

Almost surely, 2^4020252541 is an apocalyptic number.

It is an amenable number.

4020252541 is a deficient number, since it is larger than the sum of its proper divisors (211592259).

4020252541 is a wasteful number, since it uses less digits than its factorization.

4020252541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211592258.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 4020252541 is about 63405.4614445790. The cubic root of 4020252541 is about 1590.0756185441.

Adding to 4020252541 its reverse (1452520204), we get a palindrome (5472772745).

The spelling of 4020252541 in words is "four billion, twenty million, two hundred fifty-two thousand, five hundred forty-one".