133040420 has 12 divisors (see below), whose sum is σ = 279384924. Its totient is φ = 53216160.

The previous prime is 133040399. The next prime is 133040423. The reversal of 133040420 is 24040331.

It can be written as a sum of positive squares in 2 ways, for example, as 77299264 + 55741156 = 8792^2 + 7466^2 .

It is not an unprimeable number, because it can be changed into a prime (133040423) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3325991 + ... + 3326030.

It is an arithmetic number, because the mean of its divisors is an integer number (23282077).

Almost surely, 2^133040420 is an apocalyptic number.

133040420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133040420 is an abundant number, since it is smaller than the sum of its proper divisors (146344504).

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

133040420 is a wasteful number, since it uses less digits than its factorization.

133040420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6652030 (or 6652028 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 133040420 is about 11534.3148907943. The cubic root of 133040420 is about 510.4985768939.

Adding to 133040420 its reverse (24040331), we get a palindrome (157080751).

The spelling of 133040420 in words is "one hundred thirty-three million, forty thousand, four hundred twenty".