1285998497 has 8 divisors (see below), whose sum is σ = 1505559552. Its totient is φ = 1075399200.

The previous prime is 1285998487. The next prime is 1285998499. The reversal of 1285998497 is 7948995821.

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

It is a cyclic number.

It is not a de Polignac number, because 1285998497 - 2⁴ = 1285998481 is a prime.

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, 2240129 + ... + 2240702.

It is an arithmetic number, because the mean of its divisors is an integer number (188194944).

Almost surely, 2^1285998497 is an apocalyptic number.

It is an amenable number.

1285998497 is a deficient number, since it is larger than the sum of its proper divisors (219561055).

1285998497 is an equidigital number, since it uses as much as digits as its factorization.

1285998497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4480879.

The product of its digits is 13063680, while the sum is 62.

The square root of 1285998497 is about 35860.8211980707. The cubic root of 1285998497 is about 1087.4604900782.

The spelling of 1285998497 in words is "one billion, two hundred eighty-five million, nine hundred ninety-eight thousand, four hundred ninety-seven".