1209151960 has 16 divisors (see below), whose sum is σ = 2720592000. Its totient is φ = 483660768.

The previous prime is 1209151927. The next prime is 1209151969. The reversal of 1209151960 is 691519021.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1209151969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15114360 + ... + 15114439.

It is an arithmetic number, because the mean of its divisors is an integer number (170037000).

Almost surely, 2^1209151960 is an apocalyptic number.

1209151960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1209151960 is an abundant number, since it is smaller than the sum of its proper divisors (1511440040).

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

1209151960 is a wasteful number, since it uses less digits than its factorization.

1209151960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30228810 (or 30228806 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 34.

The square root of 1209151960 is about 34772.8624073429. The cubic root of 1209151960 is about 1065.3532327669.

The spelling of 1209151960 in words is "one billion, two hundred nine million, one hundred fifty-one thousand, nine hundred sixty".