621121126 has 4 divisors (see below), whose sum is σ = 931681692. Its totient is φ = 310560562.

The previous prime is 621121069. The next prime is 621121133.

621121126 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 621121097 and 621121106.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 155280280 + ... + 155280283.

It is an arithmetic number, because the mean of its divisors is an integer number (232920423).

Almost surely, 2^621121126 is an apocalyptic number.

621121126 is a deficient number, since it is larger than the sum of its proper divisors (310560566).

621121126 is a wasteful number, since it uses less digits than its factorization.

621121126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310560565.

The product of its digits is 288, while the sum is 22.

The square root of 621121126 is about 24922.3017797313. The cubic root of 621121126 is about 853.2155599520.

The spelling of 621121126 in words is "six hundred twenty-one million, one hundred twenty-one thousand, one hundred twenty-six".