1200072015 has 96 divisors (see below), whose sum is σ = 2251392000. Its totient is φ = 589545216.

The previous prime is 1200071959. The next prime is 1200072059. The reversal of 1200072015 is 5102700021.

It is not a de Polignac number, because 1200072015 - 2⁹ = 1200071503 is a prime.

It is a super-3 number, since 3×1200072015³ (a number of 28 digits) contains 333 as substring.

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 95 ways as a sum of consecutive naturals, for example, 7362324 + ... + 7362486.

It is an arithmetic number, because the mean of its divisors is an integer number (23452000).

Almost surely, 2^1200072015 is an apocalyptic number.

1200072015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1200072015 is a deficient number, since it is larger than the sum of its proper divisors (1051319985).

1200072015 is a wasteful number, since it uses less digits than its factorization.

1200072015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381 (or 378 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 1200072015 is about 34642.0555827740. The cubic root of 1200072015 is about 1062.6798263565.

Adding to 1200072015 its reverse (5102700021), we get a palindrome (6302772036).

The spelling of 1200072015 in words is "one billion, two hundred million, seventy-two thousand, fifteen".