133561740 has 48 divisors (see below), whose sum is σ = 402742368. Its totient is φ = 32876544.

The previous prime is 133561699. The next prime is 133561763. The reversal of 133561740 is 47165331.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 133561698 and 133561707.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84837 + ... + 86396.

It is an arithmetic number, because the mean of its divisors is an integer number (8390466).

Almost surely, 2^133561740 is an apocalyptic number.

133561740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133561740 is an abundant number, since it is smaller than the sum of its proper divisors (269180628).

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

133561740 is a wasteful number, since it uses less digits than its factorization.

133561740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171258 (or 171256 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 133561740 is about 11556.8914505588. The cubic root of 133561740 is about 511.1645054839.

The spelling of 133561740 in words is "one hundred thirty-three million, five hundred sixty-one thousand, seven hundred forty".