621111241 has 4 divisors (see below), whose sum is σ = 642528900. Its totient is φ = 599693584.

The previous prime is 621111223. The next prime is 621111287. The reversal of 621111241 is 142111126.

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 149352841 + 471758400 = 12221^2 + 21720^2 .

It is a cyclic number.

It is not a de Polignac number, because 621111241 - 2⁵ = 621111209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621115241) 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, 10708786 + ... + 10708843.

It is an arithmetic number, because the mean of its divisors is an integer number (160632225).

Almost surely, 2^621111241 is an apocalyptic number.

It is an amenable number.

621111241 is a deficient number, since it is larger than the sum of its proper divisors (21417659).

621111241 is a wasteful number, since it uses less digits than its factorization.

621111241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21417658.

The product of its digits is 96, while the sum is 19.

The square root of 621111241 is about 24922.1034625892. The cubic root of 621111241 is about 853.2110336848.

Adding to 621111241 its reverse (142111126), we get a palindrome (763222367).

The spelling of 621111241 in words is "six hundred twenty-one million, one hundred eleven thousand, two hundred forty-one".