3450420021 has 4 divisors (see below), whose sum is σ = 4600560032. Its totient is φ = 2300280012.

The previous prime is 3450419981. The next prime is 3450420047. The reversal of 3450420021 is 1200240543.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1200240543 = 3 ⋅400080181.

It is not a de Polignac number, because 3450420021 - 2⁹ = 3450419509 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 3450420021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3450420821) 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, 575070001 + ... + 575070006.

It is an arithmetic number, because the mean of its divisors is an integer number (1150140008).

Almost surely, 2^3450420021 is an apocalyptic number.

It is an amenable number.

3450420021 is a deficient number, since it is larger than the sum of its proper divisors (1150140011).

3450420021 is a wasteful number, since it uses less digits than its factorization.

3450420021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1150140010.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 3450420021 is about 58740.2759697297. The cubic root of 3450420021 is about 1511.0911256065.

Adding to 3450420021 its reverse (1200240543), we get a palindrome (4650660564).

The spelling of 3450420021 in words is "three billion, four hundred fifty million, four hundred twenty thousand, twenty-one".