135869570 has 48 divisors (see below), whose sum is σ = 262771128. Its totient is φ = 50561280.

The previous prime is 135869561. The next prime is 135869599. The reversal of 135869570 is 75968531.

It can be written as a sum of positive squares in 4 ways, for example, as 30991489 + 104878081 = 5567^2 + 10241^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 219902 + ... + 220518.

Almost surely, 2^135869570 is an apocalyptic number.

135869570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

135869570 is a deficient number, since it is larger than the sum of its proper divisors (126901558).

135869570 is a wasteful number, since it uses less digits than its factorization.

135869570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723 (or 704 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 44.

The square root of 135869570 is about 11656.3103081550. The cubic root of 135869570 is about 514.0918673830.

The spelling of 135869570 in words is "one hundred thirty-five million, eight hundred sixty-nine thousand, five hundred seventy".