1285964121 has 8 divisors (see below), whose sum is σ = 1846512640. Its totient is φ = 791362512.

The previous prime is 1285964111. The next prime is 1285964123. The reversal of 1285964121 is 1214695821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1285964121 - 2²² = 1281769817 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 32973439 = 1285964121 / (1 + 2 + 8 + 5 + 9 + 6 + 4 + 1 + 2 + 1).

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1285964121.

It is not an unprimeable number, because it can be changed into a prime (1285964123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16486681 + ... + 16486758.

It is an arithmetic number, because the mean of its divisors is an integer number (230814080).

Almost surely, 2^1285964121 is an apocalyptic number.

It is an amenable number.

1285964121 is a deficient number, since it is larger than the sum of its proper divisors (560548519).

1285964121 is a wasteful number, since it uses less digits than its factorization.

1285964121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32973455.

The product of its digits is 34560, while the sum is 39.

The square root of 1285964121 is about 35860.3418974220. The cubic root of 1285964121 is about 1087.4508003637.

The spelling of 1285964121 in words is "one billion, two hundred eighty-five million, nine hundred sixty-four thousand, one hundred twenty-one".