1285645078 has 8 divisors (see below), whose sum is σ = 1929043872. Its totient is φ = 642630456.

The previous prime is 1285645069. The next prime is 1285645079. The reversal of 1285645078 is 8705465821.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285645079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87525 + ... + 101152.

It is an arithmetic number, because the mean of its divisors is an integer number (241130484).

Almost surely, 2^1285645078 is an apocalyptic number.

1285645078 is a deficient number, since it is larger than the sum of its proper divisors (643398794).

1285645078 is a wasteful number, since it uses less digits than its factorization.

1285645078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192086.

The product of its (nonzero) digits is 537600, while the sum is 46.

The square root of 1285645078 is about 35855.8932115768. The cubic root of 1285645078 is about 1087.3608620687.

The spelling of 1285645078 in words is "one billion, two hundred eighty-five million, six hundred forty-five thousand, seventy-eight".