133420424 has 16 divisors (see below), whose sum is σ = 261040320. Its totient is φ = 63809680.

The previous prime is 133420423. The next prime is 133420433. The reversal of 133420424 is 424024331.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a self number, because there is not a number n which added to its sum of digits gives 133420424.

It is not an unprimeable number, because it can be changed into a prime (133420423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 362372 + ... + 362739.

It is an arithmetic number, because the mean of its divisors is an integer number (16315020).

Almost surely, 2^133420424 is an apocalyptic number.

It is an amenable number.

133420424 is a deficient number, since it is larger than the sum of its proper divisors (127619896).

133420424 is a wasteful number, since it uses less digits than its factorization.

133420424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725140 (or 725136 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 133420424 is about 11550.7759046741. The cubic root of 133420424 is about 510.9841613855.

Adding to 133420424 its reverse (424024331), we get a palindrome (557444755).

The spelling of 133420424 in words is "one hundred thirty-three million, four hundred twenty thousand, four hundred twenty-four".