1285497091258 has 8 divisors (see below), whose sum is σ = 1928250447552. Its totient is φ = 642746942076.

The previous prime is 1285497091243. The next prime is 1285497091283. The reversal of 1285497091258 is 8521907945821.

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

It is a junction number, because it is equal to n+sod(n) for n = 1285497091196 and 1285497091205.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1177941 + ... + 1989607.

It is an arithmetic number, because the mean of its divisors is an integer number (241031305944).

Almost surely, 2^{1285497091258} is an apocalyptic number.

1285497091258 is a deficient number, since it is larger than the sum of its proper divisors (642753356294).

1285497091258 is an equidigital number, since it uses as much as digits as its factorization.

1285497091258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1603556.

The product of its (nonzero) digits is 14515200, while the sum is 61.

The spelling of 1285497091258 in words is "one trillion, two hundred eighty-five billion, four hundred ninety-seven million, ninety-one thousand, two hundred fifty-eight".