620121501 has 10 divisors (see below), whose sum is σ = 926354462. Its totient is φ = 413414280.

The previous prime is 620121497. The next prime is 620121521. The reversal of 620121501 is 105121026.

It can be written as a sum of positive squares in only one way, i.e., 480267225 + 139854276 = 21915^2 + 11826^2 .

It is not a de Polignac number, because 620121501 - 2² = 620121497 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620121521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3827830 + ... + 3827991.

Almost surely, 2^620121501 is an apocalyptic number.

It is an amenable number.

620121501 is a deficient number, since it is larger than the sum of its proper divisors (306232961).

620121501 is an equidigital number, since it uses as much as digits as its factorization.

620121501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7655833 (or 7655824 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 620121501 is about 24902.2388752498. The cubic root of 620121501 is about 852.7575958369.

Adding to 620121501 its reverse (105121026), we get a palindrome (725242527).

The spelling of 620121501 in words is "six hundred twenty million, one hundred twenty-one thousand, five hundred one".