133143420 has 96 divisors (see below), whose sum is σ = 383745600. Its totient is φ = 34478080.

The previous prime is 133143403. The next prime is 133143421. The reversal of 133143420 is 24341331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133143421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 473680 + ... + 473960.

It is an arithmetic number, because the mean of its divisors is an integer number (3997350).

Almost surely, 2^133143420 is an apocalyptic number.

133143420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133143420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191872800).

133143420 is an abundant number, since it is smaller than the sum of its proper divisors (250602180).

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

133143420 is a wasteful number, since it uses less digits than its factorization.

133143420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495 (or 493 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 133143420 is about 11538.7789648645. The cubic root of 133143420 is about 510.6302857128.

Adding to 133143420 its reverse (24341331), we get a palindrome (157484751).

The spelling of 133143420 in words is "one hundred thirty-three million, one hundred forty-three thousand, four hundred twenty".