411215261 has 4 divisors (see below), whose sum is σ = 435404412. Its totient is φ = 387026112.

The previous prime is 411215221. The next prime is 411215263. The reversal of 411215261 is 162512114.

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 112996900 + 298218361 = 10630^2 + 17269^2 .

It is a cyclic number.

It is not a de Polignac number, because 411215261 - 2⁶ = 411215197 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 (411215263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12094550 + ... + 12094583.

It is an arithmetic number, because the mean of its divisors is an integer number (108851103).

Almost surely, 2^411215261 is an apocalyptic number.

It is an amenable number.

411215261 is a deficient number, since it is larger than the sum of its proper divisors (24189151).

411215261 is a wasteful number, since it uses less digits than its factorization.

411215261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24189150.

The product of its digits is 480, while the sum is 23.

The square root of 411215261 is about 20278.4432587908. The cubic root of 411215261 is about 743.6291539552.

Adding to 411215261 its reverse (162512114), we get a palindrome (573727375).

The spelling of 411215261 in words is "four hundred eleven million, two hundred fifteen thousand, two hundred sixty-one".