1287402038 has 32 divisors (see below), whose sum is σ = 2259747840. Its totient is φ = 544747680.

The previous prime is 1287402037. The next prime is 1287402049. The reversal of 1287402038 is 8302047821.

It is a junction number, because it is equal to n+sod(n) for n = 1287401989 and 1287402007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287402037) 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, 26720 + ... + 57347.

It is an arithmetic number, because the mean of its divisors is an integer number (70617120).

Almost surely, 2^1287402038 is an apocalyptic number.

1287402038 is a deficient number, since it is larger than the sum of its proper divisors (972345802).

1287402038 is a wasteful number, since it uses less digits than its factorization.

1287402038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84132.

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 1287402038 is about 35880.3851428604. The cubic root of 1287402038 is about 1087.8559649969.

Adding to 1287402038 its reverse (8302047821), we get a palindrome (9589449859).

The spelling of 1287402038 in words is "one billion, two hundred eighty-seven million, four hundred two thousand, thirty-eight".