1206144081 has 32 divisors (see below), whose sum is σ = 1867326720. Its totient is φ = 767999232.

The previous prime is 1206144077. The next prime is 1206144103. The reversal of 1206144081 is 1804416021.

It is a happy number.

1206144081 is a `hidden beast` number, since 1 + 2 + 0 + 614 + 40 + 8 + 1 = 666.

It is not a de Polignac number, because 1206144081 - 2² = 1206144077 is a prime.

It is a super-2 number, since 2×1206144081² = 2909567088262669122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1206144061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 677865 + ... + 679641.

It is an arithmetic number, because the mean of its divisors is an integer number (58353960).

Almost surely, 2^1206144081 is an apocalyptic number.

It is an amenable number.

1206144081 is a deficient number, since it is larger than the sum of its proper divisors (661182639).

1206144081 is a wasteful number, since it uses less digits than its factorization.

1206144081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2902 (or 2896 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 1206144081 is about 34729.5850968594. The cubic root of 1206144081 is about 1064.4691105260.

The spelling of 1206144081 in words is "one billion, two hundred six million, one hundred forty-four thousand, eighty-one".