133645442 has 24 divisors (see below), whose sum is σ = 234899280. Its totient is φ = 56858760.

The previous prime is 133645423. The next prime is 133645453. The reversal of 133645442 is 244546331.

It is a super-2 number, since 2×133645442² = 35722208334750728, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 133645399 and 133645408.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8717 + ... + 18527.

It is an arithmetic number, because the mean of its divisors is an integer number (9787470).

Almost surely, 2^133645442 is an apocalyptic number.

133645442 is a deficient number, since it is larger than the sum of its proper divisors (101253838).

133645442 is a wasteful number, since it uses less digits than its factorization.

133645442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9966 (or 9959 counting only the distinct ones).

The product of its digits is 34560, while the sum is 32.

The square root of 133645442 is about 11560.5121858852. The cubic root of 133645442 is about 511.2712639932.

The spelling of 133645442 in words is "one hundred thirty-three million, six hundred forty-five thousand, four hundred forty-two".