133021453 has 4 divisors (see below), whose sum is σ = 134198748. Its totient is φ = 131844160.

The previous prime is 133021439. The next prime is 133021457. The reversal of 133021453 is 354120331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 34257609 + 98763844 = 5853^2 + 9938^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133021453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133021457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 588478 + ... + 588703.

It is an arithmetic number, because the mean of its divisors is an integer number (33549687).

Almost surely, 2^133021453 is an apocalyptic number.

It is an amenable number.

133021453 is a deficient number, since it is larger than the sum of its proper divisors (1177295).

133021453 is a wasteful number, since it uses less digits than its factorization.

133021453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1177294.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 133021453 is about 11533.4926626760. The cubic root of 133021453 is about 510.4743158794.

Adding to 133021453 its reverse (354120331), we get a palindrome (487141784).

The spelling of 133021453 in words is "one hundred thirty-three million, twenty-one thousand, four hundred fifty-three".