1145623725 has 18 divisors (see below), whose sum is σ = 2051939786. Its totient is φ = 610999200.

The previous prime is 1145623723. The next prime is 1145623733. The reversal of 1145623725 is 5273265411.

1145623725 is a `hidden beast` number, since 1 + 1 + 4 + 5 + 623 + 7 + 25 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 20088324 + 1125535401 = 4482^2 + 33549^2 .

It is not a de Polignac number, because 1145623725 - 2¹ = 1145623723 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1145623725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145623723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2545606 + ... + 2546055.

Almost surely, 2^1145623725 is an apocalyptic number.

1145623725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1145623725 is a deficient number, since it is larger than the sum of its proper divisors (906316061).

1145623725 is a wasteful number, since it uses less digits than its factorization.

1145623725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5091677 (or 5091669 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 1145623725 is about 33847.0637574369. The cubic root of 1145623725 is about 1046.3588847937.

The spelling of 1145623725 in words is "one billion, one hundred forty-five million, six hundred twenty-three thousand, seven hundred twenty-five".