1206731520 has 360 divisors, whose sum is σ = 4398410016. Its totient is φ = 315850752.

The previous prime is 1206731503. The next prime is 1206731531. The reversal of 1206731520 is 251376021.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (360).

It is a super-2 number, since 2×1206731520² = 2912401922723020800, which contains 22 as substring.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 10678984 + ... + 10679096.

Almost surely, 2^1206731520 is an apocalyptic number.

1206731520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1206731520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2199205008).

1206731520 is an abundant number, since it is smaller than the sum of its proper divisors (3191678496).

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

1206731520 is a wasteful number, since it uses less digits than its factorization.

1206731520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249 (or 226 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 1206731520 is about 34738.0413955652. The cubic root of 1206731520 is about 1064.6418950743.

The spelling of 1206731520 in words is "one billion, two hundred six million, seven hundred thirty-one thousand, five hundred twenty".