1178572385 has 4 divisors (see below), whose sum is σ = 1414286868. Its totient is φ = 942857904.

The previous prime is 1178572357. The next prime is 1178572403. The reversal of 1178572385 is 5832758711.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5832758711 = 13 ⋅448673747.

It can be written as a sum of positive squares in 2 ways, for example, as 411116176 + 767456209 = 20276^2 + 27703^2 .

It is a cyclic number.

It is not a de Polignac number, because 1178572385 - 2⁶ = 1178572321 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117857234 + ... + 117857243.

It is an arithmetic number, because the mean of its divisors is an integer number (353571717).

Almost surely, 2^1178572385 is an apocalyptic number.

It is an amenable number.

1178572385 is a deficient number, since it is larger than the sum of its proper divisors (235714483).

1178572385 is an equidigital number, since it uses as much as digits as its factorization.

1178572385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235714482.

The product of its digits is 470400, while the sum is 47.

The square root of 1178572385 is about 34330.3420460676. The cubic root of 1178572385 is about 1056.2954773785.

The spelling of 1178572385 in words is "one billion, one hundred seventy-eight million, five hundred seventy-two thousand, three hundred eighty-five".