133642406 has 16 divisors (see below), whose sum is σ = 212620464. Its totient is φ = 62782464.

The previous prime is 133642403. The next prime is 133642427. The reversal of 133642406 is 604246331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133642403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18806 + ... + 24918.

It is an arithmetic number, because the mean of its divisors is an integer number (13288779).

Almost surely, 2^133642406 is an apocalyptic number.

133642406 is a deficient number, since it is larger than the sum of its proper divisors (78978058).

133642406 is a wasteful number, since it uses less digits than its factorization.

133642406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6775.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 133642406 is about 11560.3808760784. The cubic root of 133642406 is about 511.2673924775.

Adding to 133642406 its reverse (604246331), we get a palindrome (737888737).

The spelling of 133642406 in words is "one hundred thirty-three million, six hundred forty-two thousand, four hundred six".