133240905 has 24 divisors (see below), whose sum is σ = 263944512. Its totient is φ = 60909984.

The previous prime is 133240873. The next prime is 133240949. The reversal of 133240905 is 509042331.

It is not a de Polignac number, because 133240905 - 2⁵ = 133240873 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 211179 + ... + 211808.

It is an arithmetic number, because the mean of its divisors is an integer number (10997688).

Almost surely, 2^133240905 is an apocalyptic number.

133240905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

133240905 is a deficient number, since it is larger than the sum of its proper divisors (130703607).

133240905 is a wasteful number, since it uses less digits than its factorization.

133240905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423005 (or 423002 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 133240905 is about 11543.0024257123. The cubic root of 133240905 is about 510.7548798017.

The spelling of 133240905 in words is "one hundred thirty-three million, two hundred forty thousand, nine hundred five".