1282400387 has 16 divisors (see below), whose sum is σ = 1339619040. Its totient is φ = 1226115072.

The previous prime is 1282400323. The next prime is 1282400401. The reversal of 1282400387 is 7830042821.

It is a cyclic number.

It is not a de Polignac number, because 1282400387 - 2⁶ = 1282400323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1284400387) 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, 2222243 + ... + 2222819.

It is an arithmetic number, because the mean of its divisors is an integer number (83726190).

Almost surely, 2^1282400387 is an apocalyptic number.

1282400387 is a deficient number, since it is larger than the sum of its proper divisors (57218653).

1282400387 is a wasteful number, since it uses less digits than its factorization.

1282400387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1222.

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

The square root of 1282400387 is about 35810.6183554543. The cubic root of 1282400387 is about 1086.4453366440.

The spelling of 1282400387 in words is "one billion, two hundred eighty-two million, four hundred thousand, three hundred eighty-seven".