1206540615 has 32 divisors (see below), whose sum is σ = 2277421056. Its totient is φ = 533767680.

The previous prime is 1206540613. The next prime is 1206540631. The reversal of 1206540615 is 5160456021.

It is not a de Polignac number, because 1206540615 - 2¹ = 1206540613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1206540613) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 182082 + ... + 188591.

It is an arithmetic number, because the mean of its divisors is an integer number (71169408).

Almost surely, 2^1206540615 is an apocalyptic number.

1206540615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1206540615 is a deficient number, since it is larger than the sum of its proper divisors (1070880441).

1206540615 is a wasteful number, since it uses less digits than its factorization.

1206540615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370719.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 1206540615 is about 34735.2935067490. The cubic root of 1206540615 is about 1064.5857499759.

Adding to 1206540615 its reverse (5160456021), we get a palindrome (6366996636).

The spelling of 1206540615 in words is "one billion, two hundred six million, five hundred forty thousand, six hundred fifteen".