620365145 has 4 divisors (see below), whose sum is σ = 744438180. Its totient is φ = 496292112.

The previous prime is 620365121. The next prime is 620365153. The reversal of 620365145 is 541563026.

620365145 is digitally balanced in base 6, 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 an emirpimes, since its reverse is a distinct semiprime: 541563026 = 2 ⋅270781513.

It can be written as a sum of positive squares in 2 ways, for example, as 90859024 + 529506121 = 9532^2 + 23011^2 .

It is a cyclic number.

It is not a de Polignac number, because 620365145 - 2¹⁴ = 620348761 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62036510 + ... + 62036519.

It is an arithmetic number, because the mean of its divisors is an integer number (186109545).

Almost surely, 2^620365145 is an apocalyptic number.

It is an amenable number.

620365145 is a deficient number, since it is larger than the sum of its proper divisors (124073035).

620365145 is a wasteful number, since it uses less digits than its factorization.

620365145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124073034.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 620365145 is about 24907.1304047656. The cubic root of 620365145 is about 852.8692632369.

The spelling of 620365145 in words is "six hundred twenty million, three hundred sixty-five thousand, one hundred forty-five".