1025564394 has 8 divisors (see below), whose sum is σ = 2051128800. Its totient is φ = 341854796.

The previous prime is 1025564369. The next prime is 1025564429. The reversal of 1025564394 is 4934655201.

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

1025564394 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85463694 + ... + 85463705.

It is an arithmetic number, because the mean of its divisors is an integer number (256391100).

Almost surely, 2^1025564394 is an apocalyptic number.

1025564394 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1025564394 is a wasteful number, since it uses less digits than its factorization.

1025564394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170927404.

The product of its (nonzero) digits is 129600, while the sum is 39.

The square root of 1025564394 is about 32024.4343275568. The cubic root of 1025564394 is about 1008.4498633684.

The spelling of 1025564394 in words is "one billion, twenty-five million, five hundred sixty-four thousand, three hundred ninety-four".