133242407 has 2 divisors, whose sum is σ = 133242408. Its totient is φ = 133242406.

The previous prime is 133242367. The next prime is 133242437. The reversal of 133242407 is 704242331.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 133242407 - 2²² = 129048103 is a prime.

It is a Chen prime.

It is equal to p_7551503 and since 133242407 and 7551503 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133242437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66621203 + 66621204.

It is an arithmetic number, because the mean of its divisors is an integer number (66621204).

Almost surely, 2^133242407 is an apocalyptic number.

133242407 is a deficient number, since it is larger than the sum of its proper divisors (1).

133242407 is an equidigital number, since it uses as much as digits as its factorization.

133242407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 133242407 is about 11543.0674865912. The cubic root of 133242407 is about 510.7567990095.

Adding to 133242407 its reverse (704242331), we get a palindrome (837484738).

The spelling of 133242407 in words is "one hundred thirty-three million, two hundred forty-two thousand, four hundred seven".