133401421 has 8 divisors (see below), whose sum is σ = 139012920. Its totient is φ = 127857408.

The previous prime is 133401409. The next prime is 133401439. The reversal of 133401421 is 124104331.

It can be written as a sum of positive squares in 4 ways, for example, as 37576900 + 95824521 = 6130^2 + 9789^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133401421 - 2⁷ = 133401293 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 (133401461) 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, 12816 + ... + 20761.

It is an arithmetic number, because the mean of its divisors is an integer number (17376615).

Almost surely, 2^133401421 is an apocalyptic number.

It is an amenable number.

133401421 is a deficient number, since it is larger than the sum of its proper divisors (5611499).

133401421 is a wasteful number, since it uses less digits than its factorization.

133401421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33743.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 133401421 is about 11549.9532899488. The cubic root of 133401421 is about 510.9599004996.

Adding to 133401421 its reverse (124104331), we get a palindrome (257505752).

The spelling of 133401421 in words is "one hundred thirty-three million, four hundred one thousand, four hundred twenty-one".