1206603540 has 60 divisors (see below), whose sum is σ = 3785165076. Its totient is φ = 321760512.

The previous prime is 1206603533. The next prime is 1206603571. The reversal of 1206603540 is 453066021.

1206603540 is a `hidden beast` number, since 1 + 2 + 0 + 6 + 603 + 54 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 591365124 + 615238416 = 24318^2 + 24804^2 .

It is a tau number, because it is divible by the number of its divisors (60).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 370789 + ... + 374028.

Almost surely, 2^1206603540 is an apocalyptic number.

1206603540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1206603540 is an abundant number, since it is smaller than the sum of its proper divisors (2578561536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1206603540 is a wasteful number, since it uses less digits than its factorization.

1206603540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744838 (or 744827 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 1206603540 is about 34736.1992739563. The cubic root of 1206603540 is about 1064.6042568522.

Adding to 1206603540 its reverse (453066021), we get a palindrome (1659669561).

The spelling of 1206603540 in words is "one billion, two hundred six million, six hundred three thousand, five hundred forty".