620406425 has 12 divisors (see below), whose sum is σ = 795832620. Its totient is φ = 479209920.

The previous prime is 620406421. The next prime is 620406427. The reversal of 620406425 is 524604026.

It can be written as a sum of positive squares in 6 ways, for example, as 57957769 + 562448656 = 7613^2 + 23716^2 .

It is not a de Polignac number, because 620406425 - 2² = 620406421 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (620406421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 427142 + ... + 428591.

It is an arithmetic number, because the mean of its divisors is an integer number (66319385).

Almost surely, 2^620406425 is an apocalyptic number.

It is an amenable number.

620406425 is a deficient number, since it is larger than the sum of its proper divisors (175426195).

620406425 is a wasteful number, since it uses less digits than its factorization.

620406425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855772 (or 855767 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 620406425 is about 24907.9590693417. The cubic root of 620406425 is about 852.8881798715. Note that the first 3 decimals are identical.

The spelling of 620406425 in words is "six hundred twenty million, four hundred six thousand, four hundred twenty-five".