1167720025 has 6 divisors (see below), whose sum is σ = 1447972862. Its totient is φ = 934176000.

The previous prime is 1167720023. The next prime is 1167720041. The reversal of 1167720025 is 5200277611.

It can be written as a sum of positive squares in 3 ways, for example, as 129140496 + 1038579529 = 11364^2 + 32227^2 .

It is not a de Polignac number, because 1167720025 - 2¹ = 1167720023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1167720023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23354376 + ... + 23354425.

Almost surely, 2^1167720025 is an apocalyptic number.

It is an amenable number.

1167720025 is a deficient number, since it is larger than the sum of its proper divisors (280252837).

1167720025 is an equidigital number, since it uses as much as digits as its factorization.

1167720025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46708811 (or 46708806 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 1167720025 is about 34171.9186613804. The cubic root of 1167720025 is about 1053.0433324009.

Adding to 1167720025 its reverse (5200277611), we get a palindrome (6367997636).

The spelling of 1167720025 in words is "one billion, one hundred sixty-seven million, seven hundred twenty thousand, twenty-five".