1191405485 has 16 divisors (see below), whose sum is σ = 1476894720. Its totient is φ = 921697920.

The previous prime is 1191405461. The next prime is 1191405487. The reversal of 1191405485 is 5845041911.

It is a happy number.

It is not a de Polignac number, because 1191405485 - 2⁶ = 1191405421 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1191405487) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 345329 + ... + 348761.

It is an arithmetic number, because the mean of its divisors is an integer number (92305920).

Almost surely, 2^1191405485 is an apocalyptic number.

It is an amenable number.

1191405485 is a deficient number, since it is larger than the sum of its proper divisors (285489235).

1191405485 is a wasteful number, since it uses less digits than its factorization.

1191405485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5708.

The product of its (nonzero) digits is 28800, while the sum is 38.

The square root of 1191405485 is about 34516.7420971331. The cubic root of 1191405485 is about 1060.1155341614.

The spelling of 1191405485 in words is "one billion, one hundred ninety-one million, four hundred five thousand, four hundred eighty-five".