133601004 has 18 divisors (see below), whose sum is σ = 337713740. Its totient is φ = 44533656.

The previous prime is 133601003. The next prime is 133601021. The reversal of 133601004 is 400106331.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (133601003) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1855534 + ... + 1855605.

Almost surely, 2^133601004 is an apocalyptic number.

It is an amenable number.

133601004 is an abundant number, since it is smaller than the sum of its proper divisors (204112736).

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

133601004 is a wasteful number, since it uses less digits than its factorization.

133601004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3711149 (or 3711144 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 133601004 is about 11558.5900524242. The cubic root of 133601004 is about 511.2145906773.

Adding to 133601004 its reverse (400106331), we get a palindrome (533707335).

The spelling of 133601004 in words is "one hundred thirty-three million, six hundred one thousand, four".