411400021 has 4 divisors (see below), whose sum is σ = 413121600. Its totient is φ = 409678444.

The previous prime is 411400019. The next prime is 411400069. The reversal of 411400021 is 120004114.

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 411400021 - 2¹ = 411400019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 411399974 and 411400010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (411400081) 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, 860431 + ... + 860908.

It is an arithmetic number, because the mean of its divisors is an integer number (103280400).

Almost surely, 2^411400021 is an apocalyptic number.

It is an amenable number.

411400021 is a deficient number, since it is larger than the sum of its proper divisors (1721579).

411400021 is a wasteful number, since it uses less digits than its factorization.

411400021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1721578.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 411400021 is about 20282.9983237193. The cubic root of 411400021 is about 743.7405087318.

Adding to 411400021 its reverse (120004114), we get a palindrome (531404135).

The spelling of 411400021 in words is "four hundred eleven million, four hundred thousand, twenty-one".