1287365442 has 32 divisors (see below), whose sum is σ = 2861801280. Its totient is φ = 382749120.

The previous prime is 1287365423. The next prime is 1287365447. The reversal of 1287365442 is 2445637821.

It is a junction number, because it is equal to n+sod(n) for n = 1287365394 and 1287365403.

It is not an unprimeable number, because it can be changed into a prime (1287365447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180517 + ... + 187512.

It is an arithmetic number, because the mean of its divisors is an integer number (89431290).

Almost surely, 2^1287365442 is an apocalyptic number.

1287365442 is an abundant number, since it is smaller than the sum of its proper divisors (1574435838).

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

1287365442 is a wasteful number, since it uses less digits than its factorization.

1287365442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368098.

The product of its digits is 322560, while the sum is 42.

The square root of 1287365442 is about 35879.8751670069. The cubic root of 1287365442 is about 1087.8456570141.

The spelling of 1287365442 in words is "one billion, two hundred eighty-seven million, three hundred sixty-five thousand, four hundred forty-two".