1185142172 has 12 divisors (see below), whose sum is σ = 2081886576. Its totient is φ = 590317440.

The previous prime is 1185142141. The next prime is 1185142237. The reversal of 1185142172 is 2712415811.

It is a congruent 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, 562229 + ... + 564332.

It is an arithmetic number, because the mean of its divisors is an integer number (173490548).

Almost surely, 2^1185142172 is an apocalyptic number.

It is an amenable number.

1185142172 is a deficient number, since it is larger than the sum of its proper divisors (896744404).

1185142172 is a wasteful number, since it uses less digits than its factorization.

1185142172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126828 (or 1126826 counting only the distinct ones).

The product of its digits is 4480, while the sum is 32.

The square root of 1185142172 is about 34425.8939172246. The cubic root of 1185142172 is about 1058.2545654785.

Adding to 1185142172 its reverse (2712415811), we get a palindrome (3897557983).

The spelling of 1185142172 in words is "one billion, one hundred eighty-five million, one hundred forty-two thousand, one hundred seventy-two".