620142305 has 16 divisors (see below), whose sum is σ = 754192080. Its totient is φ = 489474048.

The previous prime is 620142253. The next prime is 620142317. The reversal of 620142305 is 503241026.

It can be written as a sum of positive squares in 8 ways, for example, as 2768896 + 617373409 = 1664^2 + 24847^2 .

It is a cyclic number.

It is not a de Polignac number, because 620142305 - 2¹² = 620138209 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 126989 + ... + 131781.

It is an arithmetic number, because the mean of its divisors is an integer number (47137005).

Almost surely, 2^620142305 is an apocalyptic number.

It is an amenable number.

620142305 is a deficient number, since it is larger than the sum of its proper divisors (134049775).

620142305 is a wasteful number, since it uses less digits than its factorization.

620142305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5140.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 620142305 is about 24902.6565851919. The cubic root of 620142305 is about 852.7671319094.

The spelling of 620142305 in words is "six hundred twenty million, one hundred forty-two thousand, three hundred five".