4145720625 has 30 divisors (see below), whose sum is σ = 7482943754. Its totient is φ = 2211048000.

The previous prime is 4145720591. The next prime is 4145720651. The reversal of 4145720625 is 5260275414.

It is a happy number.

4145720625 is a `hidden beast` number, since 4 + 1 + 4 + 5 + 7 + 20 + 625 = 666.

It can be written as a sum of positive squares in 5 ways, for example, as 1486565136 + 2659155489 = 38556^2 + 51567^2 .

It is not a de Polignac number, because 4145720625 - 2¹⁵ = 4145687857 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4145720625.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 362884 + ... + 374133.

Almost surely, 2^4145720625 is an apocalyptic number.

4145720625 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4145720625 is a deficient number, since it is larger than the sum of its proper divisors (3337223129).

4145720625 is an equidigital number, since it uses as much as digits as its factorization.

4145720625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737043 (or 737025 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

The square root of 4145720625 is about 64387.2706751886. The cubic root of 4145720625 is about 1606.4480192113.

The spelling of 4145720625 in words is "four billion, one hundred forty-five million, seven hundred twenty thousand, six hundred twenty-five".