1945251025 has 9 divisors (see below), whose sum is σ = 2412384753. Its totient is φ = 1556024400.

The previous prime is 1945251001. The next prime is 1945251029. The reversal of 1945251025 is 5201525491.

The square root of 1945251025 is 44105.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 88209 + 1945162816 = 297^2 + 44104^2 .

It is not a de Polignac number, because 1945251025 - 2⁷ = 1945250897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1945251029) by changing a digit.

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 8 ways as a sum of consecutive naturals, for example, 216115 + ... + 224935.

Almost surely, 2^1945251025 is an apocalyptic number.

1945251025 is the 44105-th square number.

1945251025 is the 22053-rd centered octagonal number.

It is an amenable number.

1945251025 is a deficient number, since it is larger than the sum of its proper divisors (467133728).

1945251025 is an frugal number, since it uses more digits than its factorization.

1945251025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17652 (or 8826 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 34.

The cubic root of 1945251025 is about 1248.3179562650.

The spelling of 1945251025 in words is "one billion, nine hundred forty-five million, two hundred fifty-one thousand, twenty-five".