133420401 has 24 divisors (see below), whose sum is σ = 202587840. Its totient is φ = 84449376.

The previous prime is 133420393. The next prime is 133420423. The reversal of 133420401 is 104024331.

It is not a de Polignac number, because 133420401 - 2³ = 133420393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133420501) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26455 + ... + 31091.

It is an arithmetic number, because the mean of its divisors is an integer number (8441160).

Almost surely, 2^133420401 is an apocalyptic number.

It is an amenable number.

133420401 is a deficient number, since it is larger than the sum of its proper divisors (69167439).

133420401 is a wasteful number, since it uses less digits than its factorization.

133420401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4805 (or 4802 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 133420401 is about 11550.7749090700. The cubic root of 133420401 is about 510.9841320231.

Adding to 133420401 its reverse (104024331), we get a palindrome (237444732).

The spelling of 133420401 in words is "one hundred thirty-three million, four hundred twenty thousand, four hundred one".