133745240 has 16 divisors (see below), whose sum is σ = 300926880. Its totient is φ = 53498080.

The previous prime is 133745203. The next prime is 133745243. The reversal of 133745240 is 42547331.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133745243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1671776 + ... + 1671855.

It is an arithmetic number, because the mean of its divisors is an integer number (18807930).

Almost surely, 2^133745240 is an apocalyptic number.

133745240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133745240 is an abundant number, since it is smaller than the sum of its proper divisors (167181640).

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

133745240 is a wasteful number, since it uses less digits than its factorization.

133745240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3343642 (or 3343638 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 29.

The square root of 133745240 is about 11564.8277116436. The cubic root of 133745240 is about 511.3984940572.

The spelling of 133745240 in words is "one hundred thirty-three million, seven hundred forty-five thousand, two hundred forty".