621041 has 4 divisors (see below), whose sum is σ = 631284. Its totient is φ = 610800.

The previous prime is 621031. The next prime is 621043. The reversal of 621041 is 140126.

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 160000 + 461041 = 400^2 + 679^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-621041 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621043) 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, 5030 + ... + 5151.

It is an arithmetic number, because the mean of its divisors is an integer number (157821).

2⁶²¹⁰⁴¹ is an apocalyptic number.

621041 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

621041 is a deficient number, since it is larger than the sum of its proper divisors (10243).

621041 is a wasteful number, since it uses less digits than its factorization.

621041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10242.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 621041 is about 788.0615458199. The cubic root of 621041 is about 85.3178869476.

Adding to 621041 its sum of digits (14), we get a triangular number (621055 = T₁₁₁₄).

Adding to 621041 its reverse (140126), we get a palindrome (761167).

The spelling of 621041 in words is "six hundred twenty-one thousand, forty-one".