620121502 has 48 divisors (see below), whose sum is σ = 1255830912. Its totient is φ = 223011360.

The previous prime is 620121497. The next prime is 620121521. The reversal of 620121502 is 205121026.

It is a self number, because there is not a number n which added to its sum of digits gives 620121502.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 14113 + ... + 37939.

It is an arithmetic number, because the mean of its divisors is an integer number (26163144).

Almost surely, 2^620121502 is an apocalyptic number.

620121502 is an abundant number, since it is smaller than the sum of its proper divisors (635709410).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

620121502 is a wasteful number, since it uses less digits than its factorization.

620121502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23873 (or 23860 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 620121502 is about 24902.2388953283. The cubic root of 620121502 is about 852.7575962953.

Adding to 620121502 its reverse (205121026), we get a palindrome (825242528).

The spelling of 620121502 in words is "six hundred twenty million, one hundred twenty-one thousand, five hundred two".