1285700895 has 12 divisors (see below), whose sum is σ = 2228548296. Its totient is φ = 685707120.

The previous prime is 1285700891. The next prime is 1285700909. The reversal of 1285700895 is 5980075821.

It is a happy number.

It is not a de Polignac number, because 1285700895 - 2² = 1285700891 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 28571131 = 1285700895 / (1 + 2 + 8 + 5 + 7 + 0 + 0 + 8 + 9 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 1285700895.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285700891) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14285521 + ... + 14285610.

It is an arithmetic number, because the mean of its divisors is an integer number (185712358).

Almost surely, 2^1285700895 is an apocalyptic number.

1285700895 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1285700895 is a deficient number, since it is larger than the sum of its proper divisors (942847401).

1285700895 is a wasteful number, since it uses less digits than its factorization.

1285700895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28571142 (or 28571139 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 45.

The square root of 1285700895 is about 35856.6715549561. The cubic root of 1285700895 is about 1087.3765979676.

The spelling of 1285700895 in words is "one billion, two hundred eighty-five million, seven hundred thousand, eight hundred ninety-five".