1139400025 has 27 divisors (see below), whose sum is σ = 1455749181. Its totient is φ = 884651040.

The previous prime is 1139400007. The next prime is 1139400047. The reversal of 1139400025 is 5200049311.

The square root of 1139400025 is 33755.

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 137804121 + 1001595904 = 11739^2 + 31648^2 .

It is not a de Polignac number, because 1139400025 - 2¹¹ = 1139397977 is a prime.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 7257247 + ... + 7257403.

Almost surely, 2^1139400025 is an apocalyptic number.

1139400025 is the 33755-th square number.

1139400025 is the 16878-th centered octagonal number.

It is an amenable number.

1139400025 is a deficient number, since it is larger than the sum of its proper divisors (316349156).

1139400025 is an frugal number, since it uses more digits than its factorization.

1139400025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410 (or 205 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The cubic root of 1139400025 is about 1044.4606314347.

Multiplying 1139400025 by its sum of digits (25), we get a square (28485000625 = 168775²).

1139400025 divided by its sum of digits (25) gives a square (45576001 = 6751²).

Adding to 1139400025 its reverse (5200049311), we get a palindrome (6339449336).

The spelling of 1139400025 in words is "one billion, one hundred thirty-nine million, four hundred thousand, twenty-five".