133011420 has 24 divisors (see below), whose sum is σ = 372432144. Its totient is φ = 35469696.

The previous prime is 133011413. The next prime is 133011449. The reversal of 133011420 is 24110331.

133011420 = 1804² + 1805² + ... + 1843².

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 133011420.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 1108369 + ... + 1108488.

It is an arithmetic number, because the mean of its divisors is an integer number (15518006).

Almost surely, 2^133011420 is an apocalyptic number.

133011420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133011420 is an abundant number, since it is smaller than the sum of its proper divisors (239420724).

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

133011420 is a wasteful number, since it uses less digits than its factorization.

133011420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2216869 (or 2216867 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 133011420 is about 11533.0577038355. The cubic root of 133011420 is about 510.4614815647.

Adding to 133011420 its reverse (24110331), we get a palindrome (157121751).

The spelling of 133011420 in words is "one hundred thirty-three million, eleven thousand, four hundred twenty".