411428021 has 4 divisors (see below), whose sum is σ = 415202700. Its totient is φ = 407653344.

The previous prime is 411428011. The next prime is 411428027. The reversal of 411428021 is 120824114.

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 231465796 + 179962225 = 15214^2 + 13415^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-411428021 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 (411428027) 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, 1887176 + ... + 1887393.

It is an arithmetic number, because the mean of its divisors is an integer number (103800675).

Almost surely, 2^411428021 is an apocalyptic number.

It is an amenable number.

411428021 is a deficient number, since it is larger than the sum of its proper divisors (3774679).

411428021 is a wasteful number, since it uses less digits than its factorization.

411428021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3774678.

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 411428021 is about 20283.6885452326. The cubic root of 411428021 is about 743.7573814111.

The spelling of 411428021 in words is "four hundred eleven million, four hundred twenty-eight thousand, twenty-one".