1138725025 has 27 divisors (see below), whose sum is σ = 1503752619. Its totient is φ = 855233280.

The previous prime is 1138725023. The next prime is 1138725037. The reversal of 1138725025 is 5205278311.

The square root of 1138725025 is 33745.

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

It can be written as a sum of positive squares in 13 ways, for example, as 222815329 + 915909696 = 14927^2 + 30264^2 .

It is not a de Polignac number, because 1138725025 - 2¹ = 1138725023 is a prime.

It is a super-2 number, since 2×1138725025² = 2593389365122501250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1138725023) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2868127 + ... + 2868523.

Almost surely, 2^1138725025 is an apocalyptic number.

1138725025 is the 33745-th square number.

1138725025 is the 16873-rd centered octagonal number.

It is an amenable number.

1138725025 is a deficient number, since it is larger than the sum of its proper divisors (365027594).

1138725025 is an frugal number, since it uses more digits than its factorization.

1138725025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838 (or 419 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 34.

The cubic root of 1138725025 is about 1044.2543385974.

The spelling of 1138725025 in words is "one billion, one hundred thirty-eight million, seven hundred twenty-five thousand, twenty-five".