1200870787509 has 12 divisors (see below), whose sum is σ = 1790545690752. Its totient is φ = 774755346600.

The previous prime is 1200870787481. The next prime is 1200870787541. The reversal of 1200870787509 is 9057870780021.

It is a happy number.

1200870787509 is a `hidden beast` number, since 120 + 0 + 8 + 7 + 0 + 7 + 8 + 7 + 509 = 666.

It is not a de Polignac number, because 1200870787509 - 2²⁵ = 1200837233077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200870787609) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2152097907 + ... + 2152098464.

It is an arithmetic number, because the mean of its divisors is an integer number (149212140896).

Almost surely, 2^{1200870787509} is an apocalyptic number.

It is an amenable number.

1200870787509 is a deficient number, since it is larger than the sum of its proper divisors (589674903243).

1200870787509 is a wasteful number, since it uses less digits than its factorization.

1200870787509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4304196408 (or 4304196405 counting only the distinct ones).

The product of its (nonzero) digits is 1975680, while the sum is 54.

The spelling of 1200870787509 in words is "one trillion, two hundred billion, eight hundred seventy million, seven hundred eighty-seven thousand, five hundred nine".