4345541021 has 4 divisors (see below), whose sum is σ = 4346493792. Its totient is φ = 4344588252.

The previous prime is 4345541017. The next prime is 4345541029. The reversal of 4345541021 is 1201455434.

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 4345541021 - 2² = 4345541017 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 (4345541029) 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, 469511 + ... + 478676.

It is an arithmetic number, because the mean of its divisors is an integer number (1086623448).

Almost surely, 2^4345541021 is an apocalyptic number.

It is an amenable number.

4345541021 is a deficient number, since it is larger than the sum of its proper divisors (952771).

4345541021 is an equidigital number, since it uses as much as digits as its factorization.

4345541021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952770.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 4345541021 is about 65920.7176917849. The cubic root of 4345541021 is about 1631.8539409617.

Adding to 4345541021 its reverse (1201455434), we get a palindrome (5546996455).

It can be divided in two parts, 434 and 5541021, that added together give a palindrome (5541455).

The spelling of 4345541021 in words is "four billion, three hundred forty-five million, five hundred forty-one thousand, twenty-one".