621404126 has 8 divisors (see below), whose sum is σ = 1065264240. Its totient is φ = 266316048.

The previous prime is 621404099. The next prime is 621404129.

621404126 is nontrivially palindromic in base 10.

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

It is a super-2 number, since 2×621404126² = 772286175619647752, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 621404095 and 621404104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621404129) 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, 22192991 + ... + 22193018.

It is an arithmetic number, because the mean of its divisors is an integer number (133158030).

Almost surely, 2^621404126 is an apocalyptic number.

621404126 is a deficient number, since it is larger than the sum of its proper divisors (443860114).

621404126 is a wasteful number, since it uses less digits than its factorization.

621404126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44386018.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 621404126 is about 24927.9787788742. The cubic root of 621404126 is about 853.3451231620.

It can be divided in two parts, 62140 and 4126, that added together give a palindrome (66266).

The spelling of 621404126 in words is "six hundred twenty-one million, four hundred four thousand, one hundred twenty-six".