1285998495 has 8 divisors (see below), whose sum is σ = 2057597616. Its totient is φ = 685865856.

The previous prime is 1285998487. The next prime is 1285998499. The reversal of 1285998495 is 5948995821.

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

It is not a de Polignac number, because 1285998495 - 2³ = 1285998487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285998499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42866602 + ... + 42866631.

It is an arithmetic number, because the mean of its divisors is an integer number (257199702).

Almost surely, 2^1285998495 is an apocalyptic number.

1285998495 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1285998495 is a deficient number, since it is larger than the sum of its proper divisors (771599121).

1285998495 is an equidigital number, since it uses as much as digits as its factorization.

1285998495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85733241.

The product of its digits is 9331200, while the sum is 60.

The square root of 1285998495 is about 35860.8211701852. The cubic root of 1285998495 is about 1087.4604895145.

The spelling of 1285998495 in words is "one billion, two hundred eighty-five million, nine hundred ninety-eight thousand, four hundred ninety-five".