305145625 has 10 divisors (see below), whose sum is σ = 381310754. Its totient is φ = 244116000.

The previous prime is 305145619. The next prime is 305145629. The reversal of 305145625 is 526541503.

It can be written as a sum of positive squares in 5 ways, for example, as 213043216 + 92102409 = 14596^2 + 9597^2 .

It is not a de Polignac number, because 305145625 - 2¹⁷ = 305014553 is a prime.

It is a super-2 number, since 2×305145625² = 186227704913281250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (305145629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 243492 + ... + 244741.

Almost surely, 2^305145625 is an apocalyptic number.

It is an amenable number.

305145625 is a deficient number, since it is larger than the sum of its proper divisors (76165129).

305145625 is an frugal number, since it uses more digits than its factorization.

305145625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488253 (or 488238 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 305145625 is about 17468.4179306542. The cubic root of 305145625 is about 673.2386635901.

The spelling of 305145625 in words is "three hundred five million, one hundred forty-five thousand, six hundred twenty-five".