135251780 has 24 divisors (see below), whose sum is σ = 284444160. Its totient is φ = 54021600.

The previous prime is 135251749. The next prime is 135251803. The reversal of 135251780 is 87152531.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10205 + ... + 19355.

It is an arithmetic number, because the mean of its divisors is an integer number (11851840).

Almost surely, 2^135251780 is an apocalyptic number.

135251780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135251780 is an abundant number, since it is smaller than the sum of its proper divisors (149192380).

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

135251780 is a wasteful number, since it uses less digits than its factorization.

135251780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9899 (or 9897 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 32.

The square root of 135251780 is about 11629.7798775385. The cubic root of 135251780 is about 513.3115027916.

The spelling of 135251780 in words is "one hundred thirty-five million, two hundred fifty-one thousand, seven hundred eighty".