1285687070 has 16 divisors (see below), whose sum is σ = 2317111920. Its totient is φ = 513635904.

The previous prime is 1285687043. The next prime is 1285687121. The reversal of 1285687070 is 707865821.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 71372 + ... + 87551.

It is an arithmetic number, because the mean of its divisors is an integer number (144819495).

Almost surely, 2^1285687070 is an apocalyptic number.

1285687070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1285687070 is a deficient number, since it is larger than the sum of its proper divisors (1031424850).

1285687070 is a wasteful number, since it uses less digits than its factorization.

1285687070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159739.

The product of its (nonzero) digits is 188160, while the sum is 44.

The square root of 1285687070 is about 35856.4787730195. The cubic root of 1285687070 is about 1087.3727004734.

The spelling of 1285687070 in words is "one billion, two hundred eighty-five million, six hundred eighty-seven thousand, seventy".