621246121 has 4 divisors (see below), whose sum is σ = 623270032. Its totient is φ = 619222212.

The previous prime is 621246071. The next prime is 621246127. The reversal of 621246121 is 121642126.

It is a happy number.

621246121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 121642126 = 2 ⋅60821063.

It is a cyclic number.

It is not a de Polignac number, because 621246121 - 2⁷ = 621245993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621246127) 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, 1011495 + ... + 1012108.

It is an arithmetic number, because the mean of its divisors is an integer number (155817508).

Almost surely, 2^621246121 is an apocalyptic number.

It is an amenable number.

621246121 is a deficient number, since it is larger than the sum of its proper divisors (2023911).

621246121 is a wasteful number, since it uses less digits than its factorization.

621246121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2023910.

The product of its digits is 1152, while the sum is 25.

The square root of 621246121 is about 24924.8093473150. The cubic root of 621246121 is about 853.2727900806.

Adding to 621246121 its reverse (121642126), we get a palindrome (742888247).

The spelling of 621246121 in words is "six hundred twenty-one million, two hundred forty-six thousand, one hundred twenty-one".