133235420 has 12 divisors (see below), whose sum is σ = 279794424. Its totient is φ = 53294160.

The previous prime is 133235369. The next prime is 133235471. The reversal of 133235420 is 24532331.

It is an interprime number because it is at equal distance from previous prime (133235369) and next prime (133235471).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3330866 + ... + 3330905.

It is an arithmetic number, because the mean of its divisors is an integer number (23316202).

Almost surely, 2^133235420 is an apocalyptic number.

133235420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133235420 is an abundant number, since it is smaller than the sum of its proper divisors (146559004).

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

133235420 is a wasteful number, since it uses less digits than its factorization.

133235420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6661780 (or 6661778 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 133235420 is about 11542.7648334357. The cubic root of 133235420 is about 510.7478711208.

Adding to 133235420 its reverse (24532331), we get a palindrome (157767751).

The spelling of 133235420 in words is "one hundred thirty-three million, two hundred thirty-five thousand, four hundred twenty".