621040541 has 8 divisors (see below), whose sum is σ = 682834944. Its totient is φ = 560135520.

The previous prime is 621040531. The next prime is 621040561. The reversal of 621040541 is 145040126.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-621040541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621040531) 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 7 ways as a sum of consecutive naturals, for example, 220880 + ... + 223673.

It is an arithmetic number, because the mean of its divisors is an integer number (85354368).

Almost surely, 2^621040541 is an apocalyptic number.

It is an amenable number.

621040541 is a deficient number, since it is larger than the sum of its proper divisors (61794403).

621040541 is a wasteful number, since it uses less digits than its factorization.

621040541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444691.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 621040541 is about 24920.6850026238. The cubic root of 621040541 is about 853.1786592860.

Adding to 621040541 its reverse (145040126), we get a palindrome (766080667).

The spelling of 621040541 in words is "six hundred twenty-one million, forty thousand, five hundred forty-one".