1285925098 has 4 divisors (see below), whose sum is σ = 1928887650. Its totient is φ = 642962548.

The previous prime is 1285925083. The next prime is 1285925141. The reversal of 1285925098 is 8905295821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 741309529 + 544615569 = 27227^2 + 23337^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321481273 + ... + 321481276.

Almost surely, 2^1285925098 is an apocalyptic number.

1285925098 is a deficient number, since it is larger than the sum of its proper divisors (642962552).

1285925098 is an equidigital number, since it uses as much as digits as its factorization.

1285925098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642962551.

The product of its (nonzero) digits is 518400, while the sum is 49.

The square root of 1285925098 is about 35859.7977964182. The cubic root of 1285925098 is about 1087.4398005696.

The spelling of 1285925098 in words is "one billion, two hundred eighty-five million, nine hundred twenty-five thousand, ninety-eight".