621126453 has 16 divisors (see below), whose sum is σ = 843517440. Its totient is φ = 406431984.

The previous prime is 621126449. The next prime is 621126463. The reversal of 621126453 is 354621126.

It is not a de Polignac number, because 621126453 - 2² = 621126449 is a prime.

It is a super-2 number, since 2×621126453² = 771596141232722418, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 621126453.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621126463) 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 15 ways as a sum of consecutive naturals, for example, 129150 + ... + 133872.

It is an arithmetic number, because the mean of its divisors is an integer number (52719840).

Almost surely, 2^621126453 is an apocalyptic number.

It is an amenable number.

621126453 is a deficient number, since it is larger than the sum of its proper divisors (222390987).

621126453 is a wasteful number, since it uses less digits than its factorization.

621126453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5528.

The product of its digits is 8640, while the sum is 30.

The square root of 621126453 is about 24922.4086516532. The cubic root of 621126453 is about 853.2179991253.

Adding to 621126453 its reverse (354621126), we get a palindrome (975747579).

The spelling of 621126453 in words is "six hundred twenty-one million, one hundred twenty-six thousand, four hundred fifty-three".